Cython - C extensions for the Python language

Cython is a language that makes writing C extensions for the Python language as easy as Python itself. It is based on the well-known Pyrex, but supports more cutting edge functionality and optimizations. It gives you the combined power of Python and C to let you write Python code that calls back and forth from and to C or C++ code natively at any point.

The Cython language is a superset of the Python language that 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. The C code is generated once and then compiles with all major C/C++ compilers in CPython 2.4 and later, including Python 3.x.