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A Python to C compiler
Python C JavaScript C++ Emacs Lisp Smalltalk

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Cython Allow arbitrary strides and zero- and one-sized dimensions
Demos exclude from compiled modules
Tools enable 'optimize.inline_defnode_calls' in build script
bin moved cythonrun implementation into Cython/Build/ t…
docs update docs on optimised builtins
pyximport Merge pull request #188 from pv/pyxbuild-fixes
tests Allow arbitrary strides and zero- and one-sized dimensions
.gitignore Add support for tox (
.hgtags Added tag 0.19b2 for changeset 52beb5b16df5
.travis.yml disable Py2.5 builds in travis - their installation appears to be broken
CHANGES.rst changelog
INSTALL.txt Remove trailing whitespace.
LICENSE.txt Include CHANGES.rst into the source distribution
Makefile Fix make repo.
README.txt Fix hg/git in readme.
ToDo.txt Remove trailing whitespace.
USAGE.txt Remove trailing whitespace. scripts with shebangs <-> executable + uniform use of #!/usr/bin/env … Make executable and add Unix shebang fix so file path building in Py2.[45] properly integrate pyximport into scripts with shebangs <-> executable + uniform use of #!/usr/bin/env …
tox.ini update travis/tox test config


Welcome to Cython!

Cython ( is a language that makes writing C extensions for
the Python language as easy as Python itself.  Cython is based on the
well-known Pyrex, but supports more cutting edge functionality and

The Cython language is very close to the Python language, but Cython
additionally supports calling C functions and declaring 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 wrapping external C libraries, and
for fast C modules that speed up the execution of Python code.


The original Pyrex program was licensed "free of restrictions" (see
below).  Cython itself is licensed under the permissive

   Apache License

See LICENSE.txt.


Note that Cython used to ship the full version control repository in its source
distribution, but no longer does so due to space constraints.  To get the
full source history, make sure you have git installed, then step into the
base directory of the Cython source distribution and type

    make repo

Alternatively, check out the latest developer repository from

The following is from Pyrex:
This is a development version of Pyrex, a language
for writing Python extension modules.

For more info, see:

    Doc/About.html for a description of the language
    INSTALL.txt    for installation instructions
    USAGE.txt      for usage instructions
    Demos          for usage examples

Comments, suggestions, bug reports, etc. are

Copyright stuff: Pyrex is free of restrictions. You
may use, redistribute, modify and distribute modified

The latest version of Pyrex can be found here:

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,          | A citizen of NewZealandCorp, a       |
Christchurch, New Zealand          | wholly-owned subsidiary of USA Inc.  |         +--------------------------------------+
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