Download the libraries' real source repos, apply static analysis tools, audit the source code manually, then build wheels from source instead of using prebuilt stuff from PyPI. Repeat for every update of every library. Publish your audits using crev, so others can benefit from them. Push the Python community to think about Reproducible Builds and Bootstrappable Builds.

https://github.com/crev-dev/ https://reproducible-builds.org/ https://bootstrappable.org/