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[C API] PEP 741: Add PyInitConfig C API to customize the Python initialization #107954
Description
Links to previous discussion of this feature:
Summary of proposal:
Add a text-based configuration to Python initialization
Pitch:
An API should be added to the limited C API customize the Python initialization (PyConfig API, PEP 587).
The problem is that the PyConfig C API is excluded from the limited C API, whereas the legacy initialization API is deprecated (ex: Py_VerboseFlag in Python 3.12) and being removed in Python 3.13 (ex: PySys_SetPath()).
Linked PRs
- [WIP] gh-107954: Add _PyConfig_Parse() #110145
- gh-107954: Refactor initconfig.c: add CONFIG_SPEC #110146
- [PEP 741] gh-107954: Add PyInitConfig C API #110176
- [PEP 741] gh-107954: Add PyConfig_Get() function #112609
- gh-107954: Add PyConfig_MEMBER_BOOL type to PyConfigSpec #116359
- gh-107954, PEP 741: Add PyConfig_Get() function #123472
- gh-107954, PEP 741: Add PyInitConfig C API #123502
- gh-107954, PEP 741: Adjust Python initialization config #123663
- gh-107954, PEP 741: Add PyInitConfig_AddModule() function #123668
- gh-107954: Fix configuration type for the perf profiler #124636
- gh-107954: Document PEP 741 in What's New 3.14 #127056
- gh-107954: Allow setting cpu_count in PyConfig_Set() #132954
- gh-107954: Add audit event to PyConfig_Set() #132958
Activity
pythongh-107954: Add PyInitConfig C API
pythongh-107954: Add PyInitConfig C API
pythongh-107954: Add PyInitConfig C API
pythongh-107954: Add PyInitConfig C API
pythongh-107954: Add PyInitConfig C API
pythongh-107954: Add PyConfig_Get() function
pythongh-107954: Add PyConfig_Get() function
pythongh-107954: Add PyConfig_Get() function
pythongh-107954: Add PyConfig_Get() function
pythongh-107954: Add PyConfig_Get() function
pythongh-107954: Add PyConfig_Get() function
vstinner commentedon Dec 1, 2023
I wrote PR #112609 to read configuration options such as
"verbose"or"argv"as a C int or as a Python object.pythongh-107954: Add PyInitConfig C API
pythongh-107954: Add PyInitConfig C API
vstinner commentedon Dec 20, 2023
I close the issue: #110176 (comment)
milianw commentedon Jan 16, 2024
Hey @vstinner - IIUC then there's still no non-deprecated API in the limited C API to customize the initialization, right? Can you then please reopen this task to indicate that this? Or should I report a separate issue to track this?
Thank you
vstinner commentedon Jan 16, 2024
Ok, I reopen the issue.
vstinner commentedon Jan 24, 2024
I wrote PEP 741 – Python Configuration C API. Can you please elaborate your use case to motivate the usage of the limited C API to customize the Python initialization, rather than using the non-limited PyConfig C API? I was asked for such rationale.
[-][C API] No limited C API to customize Python initialization (PyConfig, PEP 587)[/-][+][C API] PEP 741: No limited C API to customize Python initialization (PyConfig, PEP 587)[/+]milianw commentedon Jan 26, 2024
We have a large old code base with an embedded python/jupyter console in a graphical application.
We call
Py_SetProgramNameandPy_SetPythonHome- though to be frank our test suite seems to pass even without calls to these two functions, but maybe not in a packaged environment without any system python available, I have to double check that - but I believe this was the initial idea - to tell python where to look for its bundled libraries in a subfolder of our application directory.[-][C API] PEP 741: No limited C API to customize Python initialization (PyConfig, PEP 587)[/-][+][C API] PEP 741: Add stable ABI to customize Python initialization (PyConfig, PEP 587)[/+][-][C API] PEP 741: Add stable ABI to customize Python initialization (PyConfig, PEP 587)[/-][+][C API] PEP 741: Add stable ABI to customize Python initialization[/+]pythongh-107954: Add PyConfig_Get() function
pythongh-107954: Add PyConfig_MEMBER_BOOL type to PyConfigSpec
gh-107954: Add PyConfig_MEMBER_BOOL type to PyConfigSpec (#116359)
vstinner commentedon Mar 7, 2024
See also #99872 "Allow efficient read access to PyConfig options".
pythongh-107954: Add PyInitConfig C API
pythongh-107954: Add PyConfig_MEMBER_BOOL type to PyConfigSpec (pytho…
pythongh-107954: Add PyConfig_MEMBER_BOOL type to PyConfigSpec (pytho…
pythongh-107954: Add PyInitConfig C API
pythongh-107954, PEP 741: Add PyConfig_Get() function
pythongh-107954, PEP 741: Add PyInitConfig C API
[-][C API] PEP 741: Add stable ABI to customize Python initialization[/-][+][C API] PEP 741: Add PyInitConfig C API to customize the Python initialization[/+]pythongh-107954, PEP 741: Add PyInitConfig C API
pythongh-107954: Refactor initconfig.c: add CONFIG_SPEC (python#110146)
gh-107954, PEP 741: Add PyConfig_Get()/Set() functions (#123472)
gh-107954, PEP 741: Add PyInitConfig C API (#123502)
pythongh-107954, PEP 741: Adjust Python initialization config
gh-107954, PEP 741: Adjust Python initialization config (#123663)
pythongh-107954, PEP 741: Add PyInitConfig_AddModule() function
pythongh-107954, PEP 741: Add PyInitConfig_AddModule() function
pythongh-107954, PEP 741: Add PyInitConfig_AddModule() function
gh-107954, PEP 741: Add PyInitConfig_AddModule() function (#123668)
vstinner commentedon Sep 6, 2024
PEP 741 is now fully implemented, I close the issue.
pythongh-107954: Fix configuration type for the perf profiler
pythongh-107954: Fix configuration type for the perf profiler
gh-107954: Fix configuration type for the perf profiler (#124636)
pythongh-107954: Document PEP 741 in What's New 3.14
gh-107954: Document PEP 741 in What's New 3.14 (#127056)
pythongh-107954: Document PEP 741 in What's New 3.14 (python#127056)
pythongh-107954: Allow setting cpu_count in PyConfig_Set()
pythongh-107954: Allow setting cpu_count in PyConfig_Set()
pythongh-107954: Add audit event to PyConfig_Set()
gh-107954: Allow setting cpu_count in PyConfig_Set() (#132954)
gh-107954: Add audit event to PyConfig_Set() (#132958)