Picobox

Picobox is opinionated dependency injection framework designed to be clean, pragmatic and with Python in mind. No complex graphs, no implicit injections, no type bindings – just picoboxes, and explicit demands!

Why?

Because we usually want to decouple our code and Python lack of clean and pragmatic solutions (even third parties).

Features

• Support both values and factories.
• Support scopes (e.g. singleton, threadlocal, contextvars).
• Push boxes on stack, and use the top one to access values.
• Thread-safe.
• Lightweight (~500 LOC including scopes).
• Zero dependencies.
• Pure Python.
• Annotated with types.

Quickstart

First

$ [sudo] python -m pip install picobox

and then

import picobox
import requests


@picobox.pass_("conf")
@picobox.pass_("requests", as_="session")
def get_resource(uri, session, conf):
    return session.get(conf["base_uri"] + uri)


box = picobox.Box()
box.put("conf", {"base_uri": "http://example.com"})
box.put("requests", factory=requests.Session, scope=picobox.threadlocal)

with picobox.push(box):
    get_resource("/resource", requests.Session(), {})
    get_resource("/resource", requests.Session())
    get_resource("/resource")

Links

• Documentation: https://picobox.readthedocs.io
• Source: https://github.com/ikalnytskyi/picobox
• Bugs: https://github.com/ikalnytskyi/picobox/issues