The Cython compiler for writing C extensions for the Python language.

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The Cython language makes writing C extensions for the Python language as easy as Python itself. Cython is a source code translator based on Pyrex, but supports more cutting edge functionality and optimizations.

The Cython language is a superset of the Python language (almost all Python code is also valid Cython code), but Cython additionally supports optional static typing to natively call C functions, operate with C++ classes and declare fast C types on variables and class attributes. This allows the compiler to generate very efficient C code from Cython code.

This makes Cython the ideal language for writing glue code for external C/C++ libraries, and for fast C modules that speed up the execution of Python code.

Note that for one-time builds, e.g. for CI/testing, on platforms that are not covered by one of the wheel packages provided on PyPI and the pure Python wheel that we provide is not used, it is substantially faster than a full source build to install an uncompiled (slower) version of Cython with:

pip install Cython --install-option="--no-cython-compile"

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Release history Release notifications | RSS feed

3.0.11

3.0.10

3.0.9

3.0.8

3.0.7

3.0.6

3.0.5

3.0.4

3.0.3

3.0.2

3.0.1

3.0.0

3.0.0rc2 pre-release

3.0.0rc1 pre-release

3.0.0b3 pre-release

3.0.0b2 pre-release

3.0.0b1 pre-release

3.0.0a11 pre-release

3.0.0a10 pre-release

3.0.0a9 pre-release

3.0.0a8 pre-release

3.0a7 pre-release

3.0a6 pre-release

3.0a5 pre-release

3.0a4 pre-release

3.0a3 pre-release

3.0a2 pre-release

3.0a1 pre-release

0.29.37

0.29.36

0.29.35

0.29.34

0.29.33

0.29.32

0.29.31 yanked

Reason this release was yanked:

https://github.com/cython/cython/pull/4929

0.29.30

0.29.29 yanked

Reason this release was yanked:

https://github.com/cython/cython/issues/4796
This version

0.29.28

0.29.27

0.29.26

0.29.25

0.29.24

0.29.23

0.29.22

0.29.21

0.29.20

0.29.19

0.29.18

0.29.17

0.29.16

0.29.15

0.29.14

0.29.13

0.29.12

0.29.11

0.29.10

0.29.9

0.29.8

0.29.7

0.29.6

0.29.5

0.29.4

0.29.3

0.29.2

0.29.1

0.29

0.28.6

0.28.5

0.28.4

0.28.3

0.28.2

0.28.1

0.28

0.27.3

0.27.2

0.27.1

0.27

0.26.1

0.26

0.25.2

0.25.1

0.25

0.24.1

0.24

0.23.5

0.23.4

0.23.3

0.23.2

0.23.1

0.23

0.22.1

0.22

0.21.2

0.21.1

0.21

0.20.2

0.20.1

0.20

0.19.2

0.19.1

0.19

0.18

0.17.4

0.17.3

0.17.2

0.17.1

0.17

0.16

0.15.1

0.15

0.14.1

0.14

0.13

0.12.1

0.12

0.11.3

0.11.2

0.11.1

0.11

0.10.3

0.10.2

0.10.1

0.10

0.9.8.1.1

0.9.8.1

0.9.8

0.9.6.14

0.9.6.13.1

0.9.6.13

0.9.6.12

0.9.6.11

0.9.6.11b pre-release

0.9.6.10.1

0.9.6.10

0.9.6.10b pre-release

0.9.6.8

0.9.6.7

0.9.6.6

0.9.6.5

0.9.6

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