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A flake8 extension that checks for type annotations coverage

Project description


Build Status Maintainability

An extension for flake8 to report on files with a lot of code without type annotations.

This is mostly useful when you add type annotations to existing large codebase and want to know if new code in annotated modules is annotated.

Minimal annotations coverage percentage for each file can be configured via --min-coverage-percents option, default is 75.

Function is treated as annotated if it has annotation for at least one argument or return type. This is enough for mypy to threat the function not as dynamically typed.


pip install flake8-annotations-coverage


Sample file:


def annotated_function(some_arg: int):

def unannotated_function():


$ flake8 TAE001 too few type annotations

Tested on Python 3.6.5 and flake8 3.7.4.


We would love you to contribute to our project. It's simple:

  1. Create an issue with bug you found or proposal you have. Wait for approve from maintainer.
  2. Create a pull request. Make sure all checks are green.
  3. Fix review comments if any.
  4. Be awesome.

Here are useful tips:

  • You can run all checks and tests with make check. Please do it before TravisCI does.
  • We use BestDoctor python styleguide. Sorry, styleguide is available only in Russian for now.
  • We respect Django CoC. Make soft, not bullshit.

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