Unverified50% confidenceFactExact time
When a new Python version has just been released, C extension modules (such as NumPy, Pillow, cryptography) often do not yet have corresponding precompiled wheels, so pip can only fall back to compiling from source, significantly lengthening CI time.
1
Sources
50%
Confidence
Long-term
Relevance
10/12/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedCython is a tool that compiles Python code into C extensions.75% similarUnverifiedLibraries containing C/C++/Rust extension modules need to be recompiled against the new CPython ABI and have the corresponding wheels uploaded when a new version of Python is released.74% similarUnverifiedIncluding a new Python version in the test matrix as early as possible can expose issues such as syntax deprecations and C extension compatibility before the formal migration.69% similarUnverifiedPython source code files use the .py extension; if the .txt extension is retained, IDLE will be unable to correctly recognize and run the code within.67% similarUnverifiedPython 的模块系统会将已导入模块缓存在 sys.modules 字典中，简单的 importlib.reload() 无法清理依赖链上的旧引用67% similar
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