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Cython

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Last reviewed Oct 2026

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What is Cython?

Cython is a compiled programming language and compiler that is a superset of Python, allowing optional static type annotations that enable Python code to be translated to C for significant performance gains. It is maintained as an open-source project and is widely used in scientific computing libraries such as NumPy and scikit-learn to accelerate numerical code and create Python bindings for C and C++ libraries.

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1.PYXPyrex source code file

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