Welcome to Cython’s Documentation#

Also see the Cython project homepage.

• Getting Started
  • Cython - an overview
  • Installing Cython
  • Building Cython code
  • Faster code via static typing
• Tutorials
  • Basic Tutorial
  • Calling C functions
  • Using C libraries
  • Extension types (aka. cdef classes)
  • pxd files
  • Caveats
  • Profiling
  • Unicode and passing strings
  • Memory Allocation
  • Embedding Cython modules in C/C++ applications
  • Pure Python Mode
  • Working with NumPy
  • Working with Python arrays
  • Writing parallel code with Cython
  • Further reading
  • Related work
  • Appendix: Installing MinGW on Windows
• Users Guide
  • Language Basics
  • Extension Types
  • Special Methods of Extension Types
  • Sharing Declarations Between Cython Modules
  • Interfacing with External C Code
  • Source Files and Compilation
    • Compiling with Setuptools
    • Compiling with Meson
    • Compiling with CMake and scikit-build-core
    • Compiling with hatchling
  • Early Binding for Speed
  • Using C++ in Cython
  • Fused Types (Templates)
  • Porting Cython code to PyPy
  • The Limited API and Stable ABI
  • Migrating from Cython 0.29 to 3.0
  • Limitations
  • Differences between Cython and Pyrex
  • Typed Memoryviews
  • Implementing the buffer protocol
  • Using Parallelism
  • Debugging your Cython program
  • Cython for NumPy users
  • Creating Numpy ufuncs
  • Pythran as a Numpy backend
  • Cython and the GIL
  • Free threading
  • Tempita templating language
  • Troubleshooting
  • FAQ
• Glossary
• Reference Guide
  • Compilation
  • Special Methods Table
• Contributing
  • Bug/Feature Tracking and Project Culture
  • Getting started working on Cython
  • “Where does that C code come from?”
  • Cython internals
  • The Test Suite
• Cython Changelog