About Cython

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.

Cython 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. easily tune readable Python code into plain C performance by

adding static type declarations. use combined source code level debugging

to find bugs in your Python, Cython and C code. interact efficiently with large data sets,

e.g. using multi-dimensional NumPy arrays. quickly build your applications within the large, mature and widely used

CPython ecosystem. integrate natively with existing code and data from legacy, low-level or

high-performance libraries and applications.

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.

PyPy support is work in progress (on both sides)

and is considered mostly usable

in Cython 0.17.

This makes Cython the ideal language for wrapping

external C libraries,

embedding

CPython into existing applications, and for

fast C modules that speed up the execution of Python code.

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