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Contributing to MongoEngine

MongoEngine has a large community and contributions are always encouraged. Contributions can be as simple as minor tweaks to the documentation. Please read these guidelines before sending a pull request.

Bugfixes and New Features

Before starting to write code, look for existing tickets or create one for your specific issue or feature request. That way you avoid working on something that might not be of interest or that has already been addressed. If in doubt post to the user group <>

Supported Interpreters

MongoEngine supports CPython 2.6 and newer. Language features not supported by all interpreters can not be used. Please also ensure that your code is properly converted by 2to3 for Python 3 support.

Style Guide

MongoEngine aims to follow PEP8 including 4 space indents and 79 character line limits.


All tests are run on Travis and any pull requests are automatically tested by Travis. Any pull requests without tests will take longer to be integrated and might be refused.

General Guidelines

  • Avoid backward breaking changes if at all possible.
  • Write inline documentation for new classes and methods.
  • Write tests and make sure they pass (make sure you have a mongod running on the default port, then execute python test from the cmd line to run the test suite).
  • Add yourself to AUTHORS :)


To contribute to the API documentation just make your changes to the inline documentation of the appropriate source code or rst file in a branch and submit a pull request. You might also use the github Edit button.