I've always thought the flexibility should allow python to consume things like gRPC proto files or OpenAPI docs and auto-generate the classes/methods at runtime as opposed to using codegen tools. But as far as I know, there aren't any libraries out there actually doing that.

Generating code at runtime is often an anti-goal because you can’t easily introspect it. “Build-time” generation gives you that, but print often choose to go further and check the generated code to source control to be able to see the change history.

But it's an fairly easy build if you want any of that.