Compatibility: PyPy is highly compatible with existing python code. It supports cffi, cppyy, and can run popular python libraries like twisted, and django. It can also run NumPy, Scikit-learn and more via a c …

Jan 12, 2026 · Welcome to the documentation for PyPy, a fast, compliant alternative implementation of the Python language. If you want to find out more about what PyPy is, have a look at our What is …

Source 3.11 Source (tar.bz2); 3.11 Source (zip). 2.7 Source (tar.bz2); 2.7 Source (zip). More information Visit the more information page for other platforms, information about running PyPy, STM, …

Jan 12, 2026 · What is PyPy? PyPy is a reimplementation of Python in Python, using the RPython translation toolchain. PyPy tries to find new answers about ease of creation, flexibility, maintainability …

Jan 12, 2026 · What is PyPy? Historically, PyPy has been used to mean two things. The first is the RPython translation toolchain for generating interpreters for dynamic programming languages. And …

Unlike other sandboxing approaches for Python, PyPy's does not try to limit language features considered "unsafe". Instead we replace all calls to external libraries (C or platform) with a stub that …

Feb 26, 2025 · The PyPy team is proud to release version 7.3.19 of PyPy. This is primarily a bug-fix release fixing JIT-related problems and follows quickly on the heels of the previous release on Feb 6, …

CPython tries to do a gc.collect() automatically when the program finishes; not PyPy. (It is possible in both CPython and PyPy to design a case where several gc.collect() are needed before all objects …

Jan 12, 2026 · PyPy reuses almost all python modules of CPython’s standard library, currently from version 2.7.8. We sometimes need to modify modules and - more often - regression tests because …

Jan 4, 2025 · PyPy run an instance of codepseed with a very old benchmarking suite that can still run Python2 (remember: that is the language of RPython underlying PyPy). The site runs on PSA …