Pyre is a performant type checker for python.

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Build Status

Getting Started

To install Pyre on your system run pip install pyre-check and you should be good to go! Run it on your project with pyre --source-directory . check.

For more detailed documentation, see

Supported platforms

  • Python: you need Python 3.5 or later to run Pyre.
⚠️ NOTE: The minimum Python version will be switched to 3.6 around January-February 2020.
  • Operating System:
    • a recent version of Linux (we tested on Ubuntu 16.04 LTS and CentOS 7);
    • OSX 10.11 or newer;
    • please note: Windows is not supported.


See for details on installing Pyre from a packaged version or from source.

Join the Pyre community

See for how to help out.


Pyre is licensed under the MIT license.