Introducing Incompatible Changes in Python - Victor Stinner

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YouTube link　演講影片連結：TBA

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Why incompatible changes?
PEP20
Consistent coding style

The Telstars - Håll dig till höger, Svensson.
https://www.youtube.com/watch?v=6ODZtwkBYPs

Smooth Migration
- pyupgrade
- Python C API compatibility
- Test next python
  - Fedora Copr
  - GitHub CI (contiuous integration)
- Code Search
  - Report/Fix affected projects
- documentation
- warnings
  - PEP 587 – Backwards Compatibility
    - 3 releases ( 3 years)
    - PEP 602 – Annual Release Cycle for Python
Python 2.7
- Semantic Versioning
- Hidden/Abandoned Software
- PEP 606 – Python Compatibility Version
- PEP 608 – Coordinated Python release
C API
- PEP 620 – Hide implementation details from the C API
  - PEP 670 – Convert macros to functions in the Python C API
  - PEP 674 – Disallow using macros as l-values
  - HPy project - A better C API for Python
Examples
- Python
  - PIP
  - Code Type replace
  - collections aliases
  - Prefix or Suffix Variables in Python
  - PEP 414 – Explicit Unicode Literal for Python 3.3
- C API
  - PyFrameObject Python 3.11
  - CPython
  - NumPy
- Python 3.0
- PEP 594 – Removing dead batteries from the standard library
Revert
PEP 384 - Defining a Stable ABI
- PEP 652 – Maintaining the Stable ABI
- CI ABI Test
- PEP 652 – Maintaining the Stable ABI

Below is the part that speaker updated the talk/tutorial after speech
講者於演講後有更新或勘誤投影片的部份