Python¶

Documentation¶

PEP	Title	See Also
248	Python Database API Specification v1.0
249	Python Database API Specification v2.0
302	New Import Hooks
333	Python Web Server Gateway Interface v1.0	Optional Platform-Specific File Handling
428	The pathlib module – object-oriented filesystem paths
440	Version Identification and Dependency Specification	Version scheme Version specifiers
441	Improving Python ZIP Application Support
443	Single-dispatch generic functions
465	A dedicated infix operator for matrix multiplication
492	Coroutines with async and await syntax
518	Specifying Minimum Build System Requirements for Python Projects
567	Context Variables
3000	Python 3000

Environment Variable	Option	Notes
`PYTHONPATH`
`PYTHONDONTWRITEBYTECODE`	`-B`
`PYTHONSAFEPATH`	`-P`
`PYTHONWARNINGS`	`-W`	Bugtracker: -W option cannot use non-standard categories
`PYTHONIOENCODING`		StackOverflow: UnicodeDecodeError when redirecting to file When you redirect the output of your program, it is generally not possible to know what the input encoding of the receiving program is. The interpreter falls back to some default encoding for stdin, stdout, and stderr (None for Python 2, UTF-8 for Python 3). $ python -c "import sys; print sys.stdout.encoding" UTF-8 $ python -c "import sys; print sys.stdout.encoding" \| cat None Set `PYTHONIOENCODING` to override the default encoding for stdin, stdout, and stderr. $ PYTHONIOENCODING=UTF-8 python -c "import sys; print sys.stdout.encoding" \| cat UTF-8

Green Tree Snakes - The missing Python AST docs
Metaclasses
- Metaclass Programming In Python: parts one, two, three - Primer focused on the fundamentals of metaclasses
- __call__
- __init__ versus __new__

Python Developers Survey: 2017, 2018, 2019 - Collaboration between JetBrains & the Python Software Foundation
StackOverflow: The Incredible Growth of Python and Why is Python Growing So Quickly?

Official
- Python Package Index (PyPI) - Community package repository
- Python Packaging Authority (PyPA) - Working group for packaging-related projects
- Python Packaging User Guide - Guide to best practices
  - Tool recommendations
Donald Stufft: setup.py vs requirements.txt - Explains the roles of each component
Kenneth Reitz: A Better Pip Workflow - Multiple requirements files
The Many Layers of Packaging - Broad overview of packaging, “pip is for libraries”

Python 3 Readiness - Shows Python 3 support for the most popular packages on PyPI
Python 3 Statement - Pledge by scientific projects to drop Python 2 support by 2020
Python 3 Q&A - Compehensive FAQ by Nick Coghlan (Python core developer)
Brett Cannon: Why Python 3 Exists
Eevee: Why should I use Python 3? and How do I port to Python 3?