Code coverage measurement for Python.

Coverage.py measures code coverage, typically during test execution. It uses the code analysis tools and tracing hooks provided in the Python standard library to determine which lines are executable, and which have been executed.

Coverage.py runs on these versions of Python:

• Python 3.11 through 3.16.0a2, including free-threading.
• PyPy3 version 3.11.

Documentation is on Read the Docs. Code repository and issue tracker are on GitHub.

Available as part of the Tidelift Subscription. Coverage and thousands of other packages are working with Tidelift to deliver one enterprise subscription that covers all of the open source you use. If you want the flexibility of open source and the confidence of commercial-grade software, this is for you. Learn more.

Looking to run coverage on your test suite? See the Quick Start section of the docs.

The complete history of changes is on the change history page.

Everyone participating in the coverage.py project is expected to treat other people with respect and to follow the guidelines articulated in the Python Community Code of Conduct.

The Contributing section of the docs has full details about contributing to coverage.py, but importantly:

• Communicate concisely.
• Check for pull requests in progress.
• Include tests but don't over-mock.
• Describe user-visible changes in a scriv changelog fragment.

To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.

Licensed under the Apache 2.0 License. For details, see NOTICE.txt.