Python

To be fair it has some valid use cases, take ruff for example.

But pip/pypi does not have any proper security at all, and just blocking binary blobs wouldn't make a difference when you can freely execute any python code during installation - Much like downloading an executable from any site online, you are expected to make sure you can trust whoever uploaded what you are downloading. You could say the same about other sites like GitHub too.

Take a look at the Source Distribution files: https://pypi.org/project/PySimpleGUI/#files

As far as I can see, it's still all just Python.

binary blobs aren't really a security hole , since AFAIK the pypi team don't check every package for malicious code before they get shown publicly . it just shifts the trust from pypi to the library authors

Sure, and it's really nice for big compiled projects to not have to compile that on every update.