Radon

Radon is a Python tool that computes various metrics from the source code, including McCabe's cyclomatic complexity, raw metrics (SLOC, comment lines, blank lines), Halstead metrics, and the Maintainability Index. It can be used via the command line or programmatically through its API. The current version is 6.0.1, released in March 2023, and it maintains a consistent release cycle with several minor and patch updates annually.