Classes.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [],
   "source": [
    "from rich import inspect, pretty\n",
    "from rich import print\n",
    "from rich.traceback import install\n",
    "\n",
    "install(show_locals=True)\n",
    "pretty.install()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"><span style=\"color: #000080; text-decoration-color: #000080\">╭──────────────────────────────────── </span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'object'</span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&gt;</span><span style=\"color: #000080; text-decoration-color: #000080\"> ─────────────────────────────────────╮</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">object</span><span style=\"font-weight: bold\">()</span>:                                                                             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008080; text-decoration-color: #008080\">The base class of the class hierarchy.</span>                                                    <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>           <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__doc__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'The base class of the class hierarchy.\\n\\nWhen called, it accepts no</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #008000; text-decoration-color: #008000\">arguments and returns a new featureless\\ninstance that has no </span>        <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #008000; text-decoration-color: #008000\">instance attributes and cannot be given any.\\n'</span>                       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>         <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__class__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__class__</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">...</span><span style=\"font-weight: bold\">)</span>                                                    <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">type</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">object</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\"> -&gt; the object's type</span>                                     <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">type</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">name, bases, dict, **kwds</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\"> -&gt; a new type</span>                         <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>       <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__delattr__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__delattr__</span><span style=\"font-weight: bold\">(</span>self, name, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Implement </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">delattr</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">self, name</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">.</span>        <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>           <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__dir__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__dir__</span><span style=\"font-weight: bold\">(</span>self, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Default </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">dir</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">()</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\"> implementation.</span>                   <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>            <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__eq__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__eq__</span><span style=\"font-weight: bold\">(</span>self, value, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return </span><span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f\">self</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">==value.</span>                       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>        <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__format__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__format__</span><span style=\"font-weight: bold\">(</span>self, format_spec, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Default object formatter.</span>       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>            <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__ge__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__ge__</span><span style=\"font-weight: bold\">(</span>self, value, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return self&gt;=value.</span>                       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>  <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__getattribute__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__getattribute__</span><span style=\"font-weight: bold\">(</span>self, name, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">getattr</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">self, name</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">.</span>      <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>            <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__gt__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__gt__</span><span style=\"font-weight: bold\">(</span>self, value, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return self&gt;value.</span>                        <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>          <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__hash__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__hash__</span><span style=\"font-weight: bold\">(</span>self, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">hash</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">self</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">.</span>                             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>          <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__init__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__init__</span><span style=\"font-weight: bold\">(</span>self, <span style=\"color: #800080; text-decoration-color: #800080\">/</span>, *args, **kwargs<span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Initialize self.  See </span>        <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">help</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">type</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">self</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">))</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\"> for accurate signature.</span>                              <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__init_subclass__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__init_subclass__</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">...</span><span style=\"font-weight: bold\">)</span> <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">This method is called when a class is </span>     <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">subclassed.</span>                                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>            <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__le__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__le__</span><span style=\"font-weight: bold\">(</span>self, value, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return self&lt;=value.</span>                       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>            <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__lt__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__lt__</span><span style=\"font-weight: bold\">(</span>self, value, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return self&lt;value.</span>                        <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>            <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__ne__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__ne__</span><span style=\"font-weight: bold\">(</span>self, value, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return self!=value.</span>                       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>           <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__new__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__new__</span><span style=\"font-weight: bold\">(</span>*args, **kwargs<span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Create and return a new object.  See </span>   <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">help</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">type</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\"> for accurate signature.</span>                                    <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>        <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__reduce__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__reduce__</span><span style=\"font-weight: bold\">(</span>self, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Helper for pickle.</span>                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>     <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__reduce_ex__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__reduce_ex__</span><span style=\"font-weight: bold\">(</span>self, protocol, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Helper for pickle.</span>              <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>          <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__repr__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__repr__</span><span style=\"font-weight: bold\">(</span>self, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">repr</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">self</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">.</span>                             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>       <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__setattr__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__setattr__</span><span style=\"font-weight: bold\">(</span>self, name, value, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Implement </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">setattr</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">self, name, </span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">value</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">.</span>                                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>        <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__sizeof__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__sizeof__</span><span style=\"font-weight: bold\">(</span>self, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Size of object in memory, in bytes.</span>          <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>           <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__str__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__str__</span><span style=\"font-weight: bold\">(</span>self, <span style=\"color: #800080; text-decoration-color: #800080\">/</span><span style=\"font-weight: bold\">)</span>: <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Return </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">str</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">(</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">self</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">)</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">.</span>                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>  <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__subclasshook__</span> = <span style=\"color: #00ffff; text-decoration-color: #00ffff; font-style: italic\">def </span><span style=\"color: #800000; text-decoration-color: #800000; font-weight: bold\">__subclasshook__</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">...</span><span style=\"font-weight: bold\">)</span> <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">Abstract classes can override this to </span>      <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                     <span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">customize </span><span style=\"color: #bf7fbf; text-decoration-color: #bf7fbf; font-weight: bold\">issubclass</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f; font-weight: bold\">()</span><span style=\"color: #7f7f7f; text-decoration-color: #7f7f7f\">.</span>                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">╰───────────────────────────────────────────────────────────────────────────────────────────╯</span>\n",
       "</pre>\n"
      ],
      "text/plain": [
       "\u001b[34m╭─\u001b[0m\u001b[34m─────────────────────────────────── \u001b[0m\u001b[1;34m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'object'\u001b[0m\u001b[1;34m>\u001b[0m\u001b[34m ────────────────────────────────────\u001b[0m\u001b[34m─╮\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[3;96mdef \u001b[0m\u001b[1;31mobject\u001b[0m\u001b[1m(\u001b[0m\u001b[1m)\u001b[0m:                                                                             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[36mThe base class of the class hierarchy.\u001b[0m                                                    \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m           \u001b[2;3;33m__doc__\u001b[0m = \u001b[32m'The base class of the class hierarchy.\\n\\nWhen called, it accepts no\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[32marguments and returns a new featureless\\ninstance that has no \u001b[0m        \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[32minstance attributes and cannot be given any.\\n'\u001b[0m                       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m         \u001b[2;3;33m__class__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__class__\u001b[0m\u001b[1m(\u001b[0m\u001b[33m...\u001b[0m\u001b[1m)\u001b[0m                                                    \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[1;2;35mtype\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mobject\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m -> the object's type\u001b[0m                                     \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[1;2;35mtype\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mname, bases, dict, **kwds\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m -> a new type\u001b[0m                         \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m       \u001b[2;3;33m__delattr__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__delattr__\u001b[0m\u001b[1m(\u001b[0mself, name, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mImplement \u001b[0m\u001b[1;2;35mdelattr\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mself, name\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m.\u001b[0m        \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m           \u001b[2;3;33m__dir__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__dir__\u001b[0m\u001b[1m(\u001b[0mself, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mDefault \u001b[0m\u001b[1;2;35mdir\u001b[0m\u001b[1;2m(\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m implementation.\u001b[0m                   \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m            \u001b[2;3;33m__eq__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__eq__\u001b[0m\u001b[1m(\u001b[0mself, value, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn \u001b[0m\u001b[2;33mself\u001b[0m\u001b[2m==value.\u001b[0m                       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m        \u001b[2;3;33m__format__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__format__\u001b[0m\u001b[1m(\u001b[0mself, format_spec, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mDefault object formatter.\u001b[0m       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m            \u001b[2;3;33m__ge__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__ge__\u001b[0m\u001b[1m(\u001b[0mself, value, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn self>=value.\u001b[0m                       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m  \u001b[2;3;33m__getattribute__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__getattribute__\u001b[0m\u001b[1m(\u001b[0mself, name, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn \u001b[0m\u001b[1;2;35mgetattr\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mself, name\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m.\u001b[0m      \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m            \u001b[2;3;33m__gt__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__gt__\u001b[0m\u001b[1m(\u001b[0mself, value, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn self>value.\u001b[0m                        \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m          \u001b[2;3;33m__hash__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__hash__\u001b[0m\u001b[1m(\u001b[0mself, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn \u001b[0m\u001b[1;2;35mhash\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mself\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m.\u001b[0m                             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m          \u001b[2;3;33m__init__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__init__\u001b[0m\u001b[1m(\u001b[0mself, \u001b[35m/\u001b[0m, *args, **kwargs\u001b[1m)\u001b[0m: \u001b[2mInitialize self.  See \u001b[0m        \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[1;2;35mhelp\u001b[0m\u001b[1;2m(\u001b[0m\u001b[1;2;35mtype\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mself\u001b[0m\u001b[1;2m)\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m for accurate signature.\u001b[0m                              \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[2;3;33m__init_subclass__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__init_subclass__\u001b[0m\u001b[1m(\u001b[0m\u001b[33m...\u001b[0m\u001b[1m)\u001b[0m \u001b[2mThis method is called when a class is \u001b[0m     \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[2msubclassed.\u001b[0m                                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m            \u001b[2;3;33m__le__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__le__\u001b[0m\u001b[1m(\u001b[0mself, value, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn self<=value.\u001b[0m                       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m            \u001b[2;3;33m__lt__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__lt__\u001b[0m\u001b[1m(\u001b[0mself, value, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn self<value.\u001b[0m                        \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m            \u001b[2;3;33m__ne__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__ne__\u001b[0m\u001b[1m(\u001b[0mself, value, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn self!=value.\u001b[0m                       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m           \u001b[2;3;33m__new__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__new__\u001b[0m\u001b[1m(\u001b[0m*args, **kwargs\u001b[1m)\u001b[0m: \u001b[2mCreate and return a new object.  See \u001b[0m   \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[1;2;35mhelp\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mtype\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m for accurate signature.\u001b[0m                                    \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m        \u001b[2;3;33m__reduce__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__reduce__\u001b[0m\u001b[1m(\u001b[0mself, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mHelper for pickle.\u001b[0m                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m     \u001b[2;3;33m__reduce_ex__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__reduce_ex__\u001b[0m\u001b[1m(\u001b[0mself, protocol, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mHelper for pickle.\u001b[0m              \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m          \u001b[2;3;33m__repr__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__repr__\u001b[0m\u001b[1m(\u001b[0mself, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn \u001b[0m\u001b[1;2;35mrepr\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mself\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m.\u001b[0m                             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m       \u001b[2;3;33m__setattr__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__setattr__\u001b[0m\u001b[1m(\u001b[0mself, name, value, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mImplement \u001b[0m\u001b[1;2;35msetattr\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mself, name, \u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[2mvalue\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m.\u001b[0m                                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m        \u001b[2;3;33m__sizeof__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__sizeof__\u001b[0m\u001b[1m(\u001b[0mself, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mSize of object in memory, in bytes.\u001b[0m          \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m           \u001b[2;3;33m__str__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__str__\u001b[0m\u001b[1m(\u001b[0mself, \u001b[35m/\u001b[0m\u001b[1m)\u001b[0m: \u001b[2mReturn \u001b[0m\u001b[1;2;35mstr\u001b[0m\u001b[1;2m(\u001b[0m\u001b[2mself\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m.\u001b[0m                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m  \u001b[2;3;33m__subclasshook__\u001b[0m = \u001b[3;96mdef \u001b[0m\u001b[1;31m__subclasshook__\u001b[0m\u001b[1m(\u001b[0m\u001b[33m...\u001b[0m\u001b[1m)\u001b[0m \u001b[2mAbstract classes can override this to \u001b[0m      \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                     \u001b[2mcustomize \u001b[0m\u001b[1;2;35missubclass\u001b[0m\u001b[1;2m(\u001b[0m\u001b[1;2m)\u001b[0m\u001b[2m.\u001b[0m                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m╰───────────────────────────────────────────────────────────────────────────────────────────╯\u001b[0m\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "class Reveal:\n",
    "    pass\n",
    "\n",
    "r = Reveal()\n",
    "inspect(object, methods=True, all=True)    "
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Data Classes"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## collections.namedtuple"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"><span style=\"color: #000080; text-decoration-color: #000080\">╭───── </span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'__main__.Coordinate'</span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&gt;</span><span style=\"color: #000080; text-decoration-color: #000080\"> ──────╮</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">(</span><span style=\"color: #008080; text-decoration-color: #008080\">lat, lon</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">)</span>                     <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                          <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╭──────────────────────────────────────╮</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">lat</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>, <span style=\"color: #808000; text-decoration-color: #808000\">lon</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span><span style=\"font-weight: bold\">)</span>   <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╰──────────────────────────────────────╯</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                          <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>         <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__doc__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'Coordinate(lat, lon)'</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">_field_defaults</span> = <span style=\"font-weight: bold\">{}</span>                     <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>         <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">_fields</span> = <span style=\"font-weight: bold\">(</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span><span style=\"font-weight: bold\">)</span>         <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>             <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lat</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>                 <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>             <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lon</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span>                 <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>  <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__match_args__</span> = <span style=\"font-weight: bold\">(</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span><span style=\"font-weight: bold\">)</span>         <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>      <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__module__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'__main__'</span>             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>       <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__slots__</span> = <span style=\"font-weight: bold\">()</span>                     <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">╰──────────────────────────────────────────╯</span>\n",
       "</pre>\n"
      ],
      "text/plain": [
       "\u001b[34m╭─\u001b[0m\u001b[34m──── \u001b[0m\u001b[1;34m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'__main__.Coordinate'\u001b[0m\u001b[1;34m>\u001b[0m\u001b[34m ─────\u001b[0m\u001b[34m─╮\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1;36m(\u001b[0m\u001b[36mlat, lon\u001b[0m\u001b[1;36m)\u001b[0m                     \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                          \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╭──────────────────────────────────────╮\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1m(\u001b[0m\u001b[33mlat\u001b[0m=\u001b[1;36m55\u001b[0m\u001b[1;36m.756\u001b[0m, \u001b[33mlon\u001b[0m=\u001b[1;36m37\u001b[0m\u001b[1;36m.617\u001b[0m\u001b[1m)\u001b[0m   \u001b[32m│\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╰──────────────────────────────────────╯\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                          \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m         \u001b[2;3;33m__doc__\u001b[0m = \u001b[32m'Coordinate\u001b[0m\u001b[32m(\u001b[0m\u001b[32mlat, lon\u001b[0m\u001b[32m)\u001b[0m\u001b[32m'\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[3;33m_field_defaults\u001b[0m = \u001b[1m{\u001b[0m\u001b[1m}\u001b[0m                     \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m         \u001b[3;33m_fields\u001b[0m = \u001b[1m(\u001b[0m\u001b[32m'lat'\u001b[0m, \u001b[32m'lon'\u001b[0m\u001b[1m)\u001b[0m         \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m             \u001b[3;33mlat\u001b[0m = \u001b[1;36m55.756\u001b[0m                 \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m             \u001b[3;33mlon\u001b[0m = \u001b[1;36m37.617\u001b[0m                 \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m  \u001b[2;3;33m__match_args__\u001b[0m = \u001b[1m(\u001b[0m\u001b[32m'lat'\u001b[0m, \u001b[32m'lon'\u001b[0m\u001b[1m)\u001b[0m         \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m      \u001b[2;3;33m__module__\u001b[0m = \u001b[32m'__main__'\u001b[0m             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m       \u001b[2;3;33m__slots__\u001b[0m = \u001b[1m(\u001b[0m\u001b[1m)\u001b[0m                     \u001b[34m│\u001b[0m\n",
       "\u001b[34m╰──────────────────────────────────────────╯\u001b[0m\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"><span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>\n",
       "</pre>\n"
      ],
      "text/plain": [
       "\u001b[3;92mTrue\u001b[0m\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "from collections import namedtuple\n",
    "\n",
    "Coordinate = namedtuple('Coordinate', 'lat lon')\n",
    "\n",
    "moscow = Coordinate(55.756, 37.617)\n",
    "\n",
    "inspect(moscow, dunder=True)\n",
    "moscow == Coordinate(lat=55.756, lon=37.617)  # __eq__ compares all attributes"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## typing.NamedTuple"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"><span style=\"color: #000080; text-decoration-color: #000080\">╭────────────────── </span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'__main__.Coordinate'</span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&gt;</span><span style=\"color: #000080; text-decoration-color: #000080\"> ───────────────────╮</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">(</span><span style=\"color: #008080; text-decoration-color: #008080\">lat, lon</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">)</span>                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                    <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╭────────────────────────────────────────────────────────────────╮</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">lat</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>, <span style=\"color: #808000; text-decoration-color: #808000\">lon</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span><span style=\"font-weight: bold\">)</span>                             <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╰────────────────────────────────────────────────────────────────╯</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                    <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__annotations__</span> = <span style=\"font-weight: bold\">{</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;}</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>         <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__doc__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'Coordinate(lat, lon)'</span>                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">_field_defaults</span> = <span style=\"font-weight: bold\">{}</span>                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>         <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">_fields</span> = <span style=\"font-weight: bold\">(</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span><span style=\"font-weight: bold\">)</span>                                   <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>             <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lat</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>             <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lon</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span>                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>  <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__match_args__</span> = <span style=\"font-weight: bold\">(</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span><span style=\"font-weight: bold\">)</span>                                   <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>      <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__module__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'__main__'</span>                                       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>       <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__slots__</span> = <span style=\"font-weight: bold\">()</span>                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">╰────────────────────────────────────────────────────────────────────╯</span>\n",
       "</pre>\n"
      ],
      "text/plain": [
       "\u001b[34m╭─\u001b[0m\u001b[34m───────────────── \u001b[0m\u001b[1;34m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'__main__.Coordinate'\u001b[0m\u001b[1;34m>\u001b[0m\u001b[34m ──────────────────\u001b[0m\u001b[34m─╮\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1;36m(\u001b[0m\u001b[36mlat, lon\u001b[0m\u001b[1;36m)\u001b[0m                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                    \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╭────────────────────────────────────────────────────────────────╮\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1m(\u001b[0m\u001b[33mlat\u001b[0m=\u001b[1;36m55\u001b[0m\u001b[1;36m.756\u001b[0m, \u001b[33mlon\u001b[0m=\u001b[1;36m37\u001b[0m\u001b[1;36m.617\u001b[0m\u001b[1m)\u001b[0m                             \u001b[32m│\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╰────────────────────────────────────────────────────────────────╯\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                    \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[2;3;33m__annotations__\u001b[0m = \u001b[1m{\u001b[0m\u001b[32m'lat'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m, \u001b[32m'lon'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m\u001b[1m}\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m         \u001b[2;3;33m__doc__\u001b[0m = \u001b[32m'Coordinate\u001b[0m\u001b[32m(\u001b[0m\u001b[32mlat, lon\u001b[0m\u001b[32m)\u001b[0m\u001b[32m'\u001b[0m                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[3;33m_field_defaults\u001b[0m = \u001b[1m{\u001b[0m\u001b[1m}\u001b[0m                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m         \u001b[3;33m_fields\u001b[0m = \u001b[1m(\u001b[0m\u001b[32m'lat'\u001b[0m, \u001b[32m'lon'\u001b[0m\u001b[1m)\u001b[0m                                   \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m             \u001b[3;33mlat\u001b[0m = \u001b[1;36m55.756\u001b[0m                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m             \u001b[3;33mlon\u001b[0m = \u001b[1;36m37.617\u001b[0m                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m  \u001b[2;3;33m__match_args__\u001b[0m = \u001b[1m(\u001b[0m\u001b[32m'lat'\u001b[0m, \u001b[32m'lon'\u001b[0m\u001b[1m)\u001b[0m                                   \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m      \u001b[2;3;33m__module__\u001b[0m = \u001b[32m'__main__'\u001b[0m                                       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m       \u001b[2;3;33m__slots__\u001b[0m = \u001b[1m(\u001b[0m\u001b[1m)\u001b[0m                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m╰────────────────────────────────────────────────────────────────────╯\u001b[0m\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    },
    {
     "data": {
      "text/html": [
       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"><span style=\"font-weight: bold\">{</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;}</span>\n",
       "</pre>\n"
      ],
      "text/plain": [
       "\u001b[1m{\u001b[0m\u001b[32m'lat'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m, \u001b[32m'lon'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m\u001b[1m}\u001b[0m\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "import typing\n",
    "\n",
    "# Coordinate = typing.NamedTuple('Coordinate', [('lat', float), ('lon', float)])\n",
    "# or shorter:\n",
    "Coordinate = typing.NamedTuple('Coordinate', lat=float, lon=float)\n",
    "\n",
    "moscow = Coordinate(55.756, 37.617 )# immutable instance\n",
    "\n",
    "inspect(moscow, dunder=True)    \n",
    "print(typing.get_type_hints(Coordinate))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"><span style=\"color: #000080; text-decoration-color: #000080\">╭────────────────── </span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'__main__.Coordinate'</span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&gt;</span><span style=\"color: #000080; text-decoration-color: #000080\"> ───────────────────╮</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">(</span><span style=\"color: #008080; text-decoration-color: #008080\">lat, lon</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">)</span>                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                    <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╭────────────────────────────────────────────────────────────────╮</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">lat</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>, <span style=\"color: #808000; text-decoration-color: #808000\">lon</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span><span style=\"font-weight: bold\">)</span>                             <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╰────────────────────────────────────────────────────────────────╯</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                    <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__annotations__</span> = <span style=\"font-weight: bold\">{</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;}</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>         <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__doc__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'Coordinate(lat, lon)'</span>                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">_field_defaults</span> = <span style=\"font-weight: bold\">{}</span>                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>         <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">_fields</span> = <span style=\"font-weight: bold\">(</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span><span style=\"font-weight: bold\">)</span>                                   <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>             <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lat</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>             <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lon</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span>                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>  <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__match_args__</span> = <span style=\"font-weight: bold\">(</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span><span style=\"font-weight: bold\">)</span>                                   <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>      <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__module__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'__main__'</span>                                       <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>  <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__orig_bases__</span> = <span style=\"font-weight: bold\">(&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">function</span><span style=\"color: #000000; text-decoration-color: #000000\"> NamedTuple at </span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">0x01BCE268</span><span style=\"font-weight: bold\">&gt;</span>,<span style=\"font-weight: bold\">)</span>           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>       <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__slots__</span> = <span style=\"font-weight: bold\">()</span>                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">╰────────────────────────────────────────────────────────────────────╯</span>\n",
       "</pre>\n"
      ],
      "text/plain": [
       "\u001b[34m╭─\u001b[0m\u001b[34m───────────────── \u001b[0m\u001b[1;34m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'__main__.Coordinate'\u001b[0m\u001b[1;34m>\u001b[0m\u001b[34m ──────────────────\u001b[0m\u001b[34m─╮\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1;36m(\u001b[0m\u001b[36mlat, lon\u001b[0m\u001b[1;36m)\u001b[0m                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                    \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╭────────────────────────────────────────────────────────────────╮\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1m(\u001b[0m\u001b[33mlat\u001b[0m=\u001b[1;36m55\u001b[0m\u001b[1;36m.756\u001b[0m, \u001b[33mlon\u001b[0m=\u001b[1;36m37\u001b[0m\u001b[1;36m.617\u001b[0m\u001b[1m)\u001b[0m                             \u001b[32m│\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╰────────────────────────────────────────────────────────────────╯\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                    \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[2;3;33m__annotations__\u001b[0m = \u001b[1m{\u001b[0m\u001b[32m'lat'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m, \u001b[32m'lon'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m\u001b[1m}\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m         \u001b[2;3;33m__doc__\u001b[0m = \u001b[32m'Coordinate\u001b[0m\u001b[32m(\u001b[0m\u001b[32mlat, lon\u001b[0m\u001b[32m)\u001b[0m\u001b[32m'\u001b[0m                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[3;33m_field_defaults\u001b[0m = \u001b[1m{\u001b[0m\u001b[1m}\u001b[0m                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m         \u001b[3;33m_fields\u001b[0m = \u001b[1m(\u001b[0m\u001b[32m'lat'\u001b[0m, \u001b[32m'lon'\u001b[0m\u001b[1m)\u001b[0m                                   \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m             \u001b[3;33mlat\u001b[0m = \u001b[1;36m55.756\u001b[0m                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m             \u001b[3;33mlon\u001b[0m = \u001b[1;36m37.617\u001b[0m                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m  \u001b[2;3;33m__match_args__\u001b[0m = \u001b[1m(\u001b[0m\u001b[32m'lat'\u001b[0m, \u001b[32m'lon'\u001b[0m\u001b[1m)\u001b[0m                                   \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m      \u001b[2;3;33m__module__\u001b[0m = \u001b[32m'__main__'\u001b[0m                                       \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m  \u001b[2;3;33m__orig_bases__\u001b[0m = \u001b[1m(\u001b[0m\u001b[1m<\u001b[0m\u001b[1;95mfunction\u001b[0m\u001b[39m NamedTuple at \u001b[0m\u001b[1;36m0x01BCE268\u001b[0m\u001b[1m>\u001b[0m,\u001b[1m)\u001b[0m           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m       \u001b[2;3;33m__slots__\u001b[0m = \u001b[1m(\u001b[0m\u001b[1m)\u001b[0m                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m╰────────────────────────────────────────────────────────────────────╯\u001b[0m\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "from typing import NamedTuple\n",
    "\n",
    "class Coordinate(NamedTuple):\n",
    "    lat: float\n",
    "    lon: float\n",
    "\n",
    "moscow = Coordinate(55.756, 37.617) # immutable instance\n",
    "\n",
    "inspect(moscow, dunder=True)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## @dataclasses.dataclass"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/html": [
       "<pre style=\"white-space:pre;overflow-x:auto;line-height:normal;font-family:Menlo,'DejaVu Sans Mono',consolas,'Courier New',monospace\"><span style=\"color: #000080; text-decoration-color: #000080\">╭────────────────────────────── </span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'__main__.Coordinate'</span><span style=\"color: #000080; text-decoration-color: #000080; font-weight: bold\">&gt;</span><span style=\"color: #000080; text-decoration-color: #000080\"> ──────────────────────────────╮</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">(</span><span style=\"color: #008080; text-decoration-color: #008080\">lat: float, lon: float</span><span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">)</span>                                                        <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╭───────────────────────────────────────────────────────────────────────────────────────╮</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Coordinate</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">lat</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>, <span style=\"color: #808000; text-decoration-color: #808000\">lon</span>=<span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span><span style=\"font-weight: bold\">)</span>                                                    <span style=\"color: #008000; text-decoration-color: #008000\">│</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #008000; text-decoration-color: #008000\">╰───────────────────────────────────────────────────────────────────────────────────────╯</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                                                                                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>      <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__annotations__</span> = <span style=\"font-weight: bold\">{</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span>: <span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span><span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;}</span>                   <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__dataclass_fields__</span> = <span style=\"font-weight: bold\">{</span>                                                                  <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                            <span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>: <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Field</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">name</span>=<span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>,<span style=\"color: #808000; text-decoration-color: #808000\">type</span>=<span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span>                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                        <span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;</span>,<span style=\"color: #808000; text-decoration-color: #808000\">default</span>=<span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">dataclasses._MISSING_TYPE</span><span style=\"color: #000000; text-decoration-color: #000000\"> object at </span>             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                        <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">0x0388F508</span><span style=\"font-weight: bold\">&gt;</span>,<span style=\"color: #808000; text-decoration-color: #808000\">default_factory</span>=<span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">dataclasses._MISSING_TYPE</span><span style=\"color: #000000; text-decoration-color: #000000\"> object at </span>  <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                        <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">0x0388F508</span><span style=\"font-weight: bold\">&gt;</span>,<span style=\"color: #808000; text-decoration-color: #808000\">init</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">repr</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">hash</span>=<span style=\"color: #800080; text-decoration-color: #800080; font-style: italic\">None</span>,<span style=\"color: #808000; text-decoration-color: #808000\">compare</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">metadata</span>=<span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">m…</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                            <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span>: <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">Field</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">name</span>=<span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span>,<span style=\"color: #808000; text-decoration-color: #808000\">type</span>=<span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">class</span><span style=\"color: #000000; text-decoration-color: #000000\"> </span>                           <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                        <span style=\"color: #008000; text-decoration-color: #008000\">'float'</span><span style=\"font-weight: bold\">&gt;</span>,<span style=\"color: #808000; text-decoration-color: #808000\">default</span>=<span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">dataclasses._MISSING_TYPE</span><span style=\"color: #000000; text-decoration-color: #000000\"> object at </span>             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                        <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">0x0388F508</span><span style=\"font-weight: bold\">&gt;</span>,<span style=\"color: #808000; text-decoration-color: #808000\">default_factory</span>=<span style=\"font-weight: bold\">&lt;</span><span style=\"color: #ff00ff; text-decoration-color: #ff00ff; font-weight: bold\">dataclasses._MISSING_TYPE</span><span style=\"color: #000000; text-decoration-color: #000000\"> object at </span>  <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                        <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">0x0388F508</span><span style=\"font-weight: bold\">&gt;</span>,<span style=\"color: #808000; text-decoration-color: #808000\">init</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">repr</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">hash</span>=<span style=\"color: #800080; text-decoration-color: #800080; font-style: italic\">None</span>,<span style=\"color: #808000; text-decoration-color: #808000\">compare</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">metadata</span>=<span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">m…</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                        <span style=\"font-weight: bold\">}</span>                                                                  <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span> <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__dataclass_params__</span> = <span style=\"color: #800080; text-decoration-color: #800080; font-weight: bold\">_DataclassParams</span><span style=\"font-weight: bold\">(</span><span style=\"color: #808000; text-decoration-color: #808000\">init</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">repr</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">eq</span>=<span style=\"color: #00ff00; text-decoration-color: #00ff00; font-style: italic\">True</span>,<span style=\"color: #808000; text-decoration-color: #808000\">order</span>=<span style=\"color: #ff0000; text-decoration-color: #ff0000; font-style: italic\">False</span>,<span style=\"color: #808000; text-decoration-color: #808000\">unsafe_h…</span> <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>             <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__dict__</span> = <span style=\"font-weight: bold\">{</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>: <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span>: <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span><span style=\"font-weight: bold\">}</span>                                     <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>              <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__doc__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'Coordinate(lat: float, lon: float)'</span>                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                  <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lat</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">55.756</span>                                                             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>                  <span style=\"color: #808000; text-decoration-color: #808000; font-style: italic\">lon</span> = <span style=\"color: #008080; text-decoration-color: #008080; font-weight: bold\">37.617</span>                                                             <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>       <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__match_args__</span> = <span style=\"font-weight: bold\">(</span><span style=\"color: #008000; text-decoration-color: #008000\">'lat'</span>, <span style=\"color: #008000; text-decoration-color: #008000\">'lon'</span><span style=\"font-weight: bold\">)</span>                                                     <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>           <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__module__</span> = <span style=\"color: #008000; text-decoration-color: #008000\">'__main__'</span>                                                         <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">│</span>          <span style=\"color: #bfbf7f; text-decoration-color: #bfbf7f; font-style: italic\">__weakref__</span> = <span style=\"color: #800080; text-decoration-color: #800080; font-style: italic\">None</span>                                                               <span style=\"color: #000080; text-decoration-color: #000080\">│</span>\n",
       "<span style=\"color: #000080; text-decoration-color: #000080\">╰───────────────────────────────────────────────────────────────────────────────────────────╯</span>\n",
       "</pre>\n"
      ],
      "text/plain": [
       "\u001b[34m╭─\u001b[0m\u001b[34m───────────────────────────── \u001b[0m\u001b[1;34m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'__main__.Coordinate'\u001b[0m\u001b[1;34m>\u001b[0m\u001b[34m ─────────────────────────────\u001b[0m\u001b[34m─╮\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1;36m(\u001b[0m\u001b[36mlat: float, lon: float\u001b[0m\u001b[1;36m)\u001b[0m                                                        \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╭───────────────────────────────────────────────────────────────────────────────────────╮\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m│\u001b[0m \u001b[1;35mCoordinate\u001b[0m\u001b[1m(\u001b[0m\u001b[33mlat\u001b[0m=\u001b[1;36m55\u001b[0m\u001b[1;36m.756\u001b[0m, \u001b[33mlon\u001b[0m=\u001b[1;36m37\u001b[0m\u001b[1;36m.617\u001b[0m\u001b[1m)\u001b[0m                                                    \u001b[32m│\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[32m╰───────────────────────────────────────────────────────────────────────────────────────╯\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                                                                                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m      \u001b[2;3;33m__annotations__\u001b[0m = \u001b[1m{\u001b[0m\u001b[32m'lat'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m, \u001b[32m'lon'\u001b[0m: \u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m\u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m\u001b[1m}\u001b[0m                   \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[2;3;33m__dataclass_fields__\u001b[0m = \u001b[1m{\u001b[0m                                                                  \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                            \u001b[32m'lat'\u001b[0m: \u001b[1;35mField\u001b[0m\u001b[1m(\u001b[0m\u001b[33mname\u001b[0m=\u001b[32m'lat'\u001b[0m,\u001b[33mtype\u001b[0m=\u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                        \u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m,\u001b[33mdefault\u001b[0m=\u001b[1m<\u001b[0m\u001b[1;95mdataclasses._MISSING_TYPE\u001b[0m\u001b[39m object at \u001b[0m             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                        \u001b[1;36m0x0388F508\u001b[0m\u001b[1m>\u001b[0m,\u001b[33mdefault_factory\u001b[0m=\u001b[1m<\u001b[0m\u001b[1;95mdataclasses._MISSING_TYPE\u001b[0m\u001b[39m object at \u001b[0m  \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                        \u001b[1;36m0x0388F508\u001b[0m\u001b[1m>\u001b[0m,\u001b[33minit\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33mrepr\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33mhash\u001b[0m=\u001b[3;35mNone\u001b[0m,\u001b[33mcompare\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33mmetadata\u001b[0m=\u001b[1;35mm…\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                            \u001b[32m'lon'\u001b[0m: \u001b[1;35mField\u001b[0m\u001b[1m(\u001b[0m\u001b[33mname\u001b[0m=\u001b[32m'lon'\u001b[0m,\u001b[33mtype\u001b[0m=\u001b[1m<\u001b[0m\u001b[1;95mclass\u001b[0m\u001b[39m \u001b[0m                           \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                        \u001b[32m'float'\u001b[0m\u001b[1m>\u001b[0m,\u001b[33mdefault\u001b[0m=\u001b[1m<\u001b[0m\u001b[1;95mdataclasses._MISSING_TYPE\u001b[0m\u001b[39m object at \u001b[0m             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                        \u001b[1;36m0x0388F508\u001b[0m\u001b[1m>\u001b[0m,\u001b[33mdefault_factory\u001b[0m=\u001b[1m<\u001b[0m\u001b[1;95mdataclasses._MISSING_TYPE\u001b[0m\u001b[39m object at \u001b[0m  \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                        \u001b[1;36m0x0388F508\u001b[0m\u001b[1m>\u001b[0m,\u001b[33minit\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33mrepr\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33mhash\u001b[0m=\u001b[3;35mNone\u001b[0m,\u001b[33mcompare\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33mmetadata\u001b[0m=\u001b[1;35mm…\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                        \u001b[1m}\u001b[0m                                                                  \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m \u001b[2;3;33m__dataclass_params__\u001b[0m = \u001b[1;35m_DataclassParams\u001b[0m\u001b[1m(\u001b[0m\u001b[33minit\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33mrepr\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33meq\u001b[0m=\u001b[3;92mTrue\u001b[0m,\u001b[33morder\u001b[0m=\u001b[3;91mFalse\u001b[0m,\u001b[33munsafe_h…\u001b[0m \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m             \u001b[2;3;33m__dict__\u001b[0m = \u001b[1m{\u001b[0m\u001b[32m'lat'\u001b[0m: \u001b[1;36m55.756\u001b[0m, \u001b[32m'lon'\u001b[0m: \u001b[1;36m37.617\u001b[0m\u001b[1m}\u001b[0m                                     \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m              \u001b[2;3;33m__doc__\u001b[0m = \u001b[32m'Coordinate\u001b[0m\u001b[32m(\u001b[0m\u001b[32mlat: float, lon: float\u001b[0m\u001b[32m)\u001b[0m\u001b[32m'\u001b[0m                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                  \u001b[3;33mlat\u001b[0m = \u001b[1;36m55.756\u001b[0m                                                             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m                  \u001b[3;33mlon\u001b[0m = \u001b[1;36m37.617\u001b[0m                                                             \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m       \u001b[2;3;33m__match_args__\u001b[0m = \u001b[1m(\u001b[0m\u001b[32m'lat'\u001b[0m, \u001b[32m'lon'\u001b[0m\u001b[1m)\u001b[0m                                                     \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m           \u001b[2;3;33m__module__\u001b[0m = \u001b[32m'__main__'\u001b[0m                                                         \u001b[34m│\u001b[0m\n",
       "\u001b[34m│\u001b[0m          \u001b[2;3;33m__weakref__\u001b[0m = \u001b[3;35mNone\u001b[0m                                                               \u001b[34m│\u001b[0m\n",
       "\u001b[34m╰───────────────────────────────────────────────────────────────────────────────────────────╯\u001b[0m\n"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "from dataclasses import dataclass\n",
    "\n",
    "@dataclass(frozen=True)\n",
    "class Coordinate:\n",
    "    lat: float\n",
    "    lon: float\n",
    "\n",
    "moscow = Coordinate(55.756, 37.617) # mutable instance, protected with 'frozen=True'\n",
    "\n",
    " \n",
    "inspect(moscow, dunder=True)"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3.10.6 32-bit",
   "language": "python",
   "name": "python3"
  },
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