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python/cpython

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cached 2026-03-30T15:42:56.937Z
1mo ago

python/cpython

CPython is the upstream reference implementation of Python, with a very large, active codebase and frequent recent commits. The repository is broad and production-grade, covering the language runtime, standard library, parser, objects, build systems, docs, and platform-specific support across Unix-like systems, Windows, macOS, iOS, Android, and Emscripten. Forks are most interesting if you care about language/runtime changes, interpreter performance, portability, or core tooling rather than a small application project.

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Stars72,119
Forks34,328
Default branchmain
Last pushed2026-03-30T14:23:32Z
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Choose this fork if you want to work on or adopt performance-oriented interpreter changes and related platform experimentation. Choose upstream if you want the newest CPython fixes, lowest maintenance burden, and the broadest compatibility.

Choose this fork if you want to study or extend CPython internals, especially executor/JIT and profiling work, and you can tolerate heavy divergence from upstream. Choose upstream if you need the latest broadly validated Python changes with lower maintenance risk.

Choose this fork only if Windows 7 support is the primary constraint. If you can run a newer supported OS, upstream CPython is the better default because this fork is stale and substantially behind current development.

Choose this fork only if your priority is distributing a precompiled standard library variant and you can tolerate being materially behind upstream CPython. If you need current Python runtime work, broad platform support, or low-maintenance upstream compatibility, stock CPython is the better choice.

Choose this fork only if its platform/build additions match a concrete deployment need. If you want the newest CPython behavior, compatibility, or upstream support, stock CPython is the safer choice.

Choose this fork if your priority is a self-contained, packaging-friendly Python build and you are willing to trade away upstream closeness. If you want the newest CPython runtime features and the lowest maintenance burden, upstream CPython is the safer default.

Choose this fork if you want an experimental CPython base with JIT/profiling/runtime changes and you are willing to absorb divergence from upstream. Avoid it if you need a low-risk, upstream-aligned Python baseline with full test and documentation parity.

Choose this fork only if you specifically want a register-based CPython experiment and are willing to own a heavily divergent, stale codebase. For most adopters who need current Python behavior, active maintenance, or easy upstream tracking, upstream CPython is the better choice.

Choose this fork if your priority is a CPython that fits Mingw-w64/MSYS2 workflows. Choose upstream if you want the latest Python work with minimal divergence and the broadest compatibility.

Choose this fork if your goal is running or maintaining Python on PSVita and you need its platform-specific build and path behavior. Avoid it if you want a current CPython baseline, broad upstream compatibility, or active maintenance.

python/cpython · Discofork