PEPs that hit the front page

Learn about recent impactful PEPs shaping Python's future

Transcript

1. PEPs that hit the front page
3. Python Mauritius Usergroup site fb linkedin mailing list url pymug.com site 3
4. About me compileralchemy.com 4
5. slides 5
6. PEPs that hit the front page 6
7. PEPs -> Python Enhancement Proposal 7
8. Process: Proposal Seek sponsor Formulate draft and propose Verdict Accepted Implemented 8
9. All considerable Python improvements & features pass by PEPs 9
10. PEP 684 – A Per-Interpreter GIL 10
11. GIL -> Global Interpreter Lock 11
12. mutex only one thread executing python: on mutex / lock for threads GIL -> Allows values to be changed safely Prevents multi-core support 12
13. A Per-Interpreter GIL 13
14. Have many interpreters Sub interpreters Each one has a GIL Each thread runs interpreter with own GIL Work on PEP 554 – Multiple Interpreters in the Stdlib -- makes sense in context of this pep 14
15. PEP 703 – Making the Global Interpreter Lock Optional in CPython 15
16. Sam gross: Fb engineer Changes to internals Not much change to C API GIL optional, diabled by default: https://github.com/colesbury/nogil Allows parallelizing well up to the number of available cores Replaces CPython's allocator with https://github.com/microsoft/mimalloc helps GPU-heavy workloads 16
17. More than a POC In the Dose-3D project, the key challenge was to maintain a stable, non-trivial concurrent communication link with hardware units while utilizing a 1 Gbit/s UDP/IP connection to the maximum. Naturally, we started with the multiprocessing package, but at some point, it became clear that most CPU time was consumed by the data transfers between the data processing stages, not by data processing itself. The CPython multithreading implementation based on GIL was a dead end too. When we found out about the “nogil” fork of Python it took a single person less than half a working day to adjust the codebase to use this fork and the results were astonishing. 17
18. PEP 621 – Storing project metadata in pyproject.toml 18
19. project metadata in pyproject.toml diables code execution to read project data 19
20. PEP 8 – Style Guide for Python Code 20
21. Style guide Zen of Python 21
22. Interesting Open PEPs PEP 738 – Adding Android as a supported platform PEP 730 – Adding iOS as a supported platform 22
23. That's all folks 23