Clean up Python 2 compatibility wrappers #212

DifferentialOrange · 2022-03-17T13:29:16Z

It is expected to remove Python 2 support in #207 . There are many compatibility workaround all around the code, but it is not a part of #207 to clean them up. This ticket is created to track this activity.

Python 2.7 reached the end of its life on January 1st, 2020.

See also #207 (comment)

Python 2.7 reached the end of its life on January 1st, 2020 [1]. Since it would be a waste to ignore several Python 3.x features in master discovery implementation, we decided to drop Python 2 support here. Python 2 workaround cleanup activities are expected to be solved as part of #212 solution. 1. https://www.python.org/doc/sunset-python-2/ Part of #196

The built-in basestring abstract type was removed in Python 3 [1]. str must be used for string and bytes for byte objects. long type was unified with int in Python 3 [2]. 1. https://docs.python.org/3/whatsnew/3.0.html?highlight=basestring 2. https://peps.python.org/pep-0237/ Part of #212

Since Python 3 the default encoding of source files is already UTF-8 [1]. Unless instruction says something other than some variation of "utf-8", it has no effect [2]. 1. https://docs.python.org/3/howto/unicode.html#the-string-type 2. https://stackoverflow.com/questions/4872007/where-does-this-come-from-coding-utf-8 Part of #212

StandardError was removed in Python 3 [1]. PEP 249 footnote 10 [2] declares that database modules targeting Python 3 should use Exception as base class instead. 1. https://docs.python.org/3/whatsnew/3.0.html?highlight=standarderror 2. https://peps.python.org/pep-0249/#footnotes Part of #212

collections.abc is not a part of collections since Python 3.3 [1]. 1. https://docs.python.org/3/library/collections.abc.html Part of #212

ctypes.c_ssize_t was introduced in Python 2.7 [1] and Python 3.2 [2]. 1. https://docs.python.org/2.7/library/ctypes.html#ctypes.c_ssize_t 2. https://docs.python.org/3.2/library/ctypes.html#ctypes.c_ssize_t Part of #212

ctypes.c_ssize_t was introduced in Python 2.7 [1] and Python 3.2 [2]. 1. https://docs.python.org/2.7/library/ctypes.html#ctypes.c_ssize_t 2. https://docs.python.org/3.2/library/ctypes.html#ctypes.c_ssize_t Closes #212

The built-in basestring abstract type was removed in Python 3 [1]. str must be used for string and bytes for byte objects. long type was unified with int in Python 3 [2]. 1. https://docs.python.org/3/whatsnew/3.0.html?highlight=basestring 2. https://peps.python.org/pep-0237/ Part of #212

Since Python 3 the default encoding of source files is already UTF-8 [1]. Unless instruction says something other than some variation of "utf-8", it has no effect [2]. 1. https://docs.python.org/3/howto/unicode.html#the-string-type 2. https://stackoverflow.com/questions/4872007/where-does-this-come-from-coding-utf-8 Part of #212

StandardError was removed in Python 3 [1]. PEP 249 footnote 10 [2] declares that database modules targeting Python 3 should use Exception as base class instead. 1. https://docs.python.org/3/whatsnew/3.0.html?highlight=standarderror 2. https://peps.python.org/pep-0249/#footnotes Part of #212

collections.abc is not a part of collections since Python 3.3 [1]. 1. https://docs.python.org/3/library/collections.abc.html Part of #212

ctypes.c_ssize_t was introduced in Python 2.7 [1] and Python 3.2 [2]. 1. https://docs.python.org/2.7/library/ctypes.html#ctypes.c_ssize_t 2. https://docs.python.org/3.2/library/ctypes.html#ctypes.c_ssize_t Closes #212

The built-in basestring abstract type was removed in Python 3 [1]. str must be used for string and bytes for byte objects. long type was unified with int in Python 3 [2]. 1. https://docs.python.org/3/whatsnew/3.0.html?highlight=basestring 2. https://peps.python.org/pep-0237/ Part of #212

Since Python 3 the default encoding of source files is already UTF-8 [1]. Unless instruction says something other than some variation of "utf-8", it has no effect [2]. 1. https://docs.python.org/3/howto/unicode.html#the-string-type 2. https://stackoverflow.com/questions/4872007/where-does-this-come-from-coding-utf-8 Part of #212

StandardError was removed in Python 3 [1]. PEP 249 footnote 10 [2] declares that database modules targeting Python 3 should use Exception as base class instead. 1. https://docs.python.org/3/whatsnew/3.0.html?highlight=standarderror 2. https://peps.python.org/pep-0249/#footnotes Part of #212

collections.abc was introduced in Python 3.3 [1]. 1. https://docs.python.org/3/library/collections.abc.html Part of #212

ctypes.c_ssize_t was introduced in Python 2.7 [1] and Python 3.2 [2]. 1. https://docs.python.org/2.7/library/ctypes.html#ctypes.c_ssize_t 2. https://docs.python.org/3.2/library/ctypes.html#ctypes.c_ssize_t Part of #212