The original problem is that Python wants to generate random numbers at *startup*. Are those random numbers really used for crypto-related activities? I doubt it.

So isn't the proper solution to have two functions, one delivering random numbers that are usable for crypto-related activities, and which would potentially block, and a second one that delivers random numbers that are not appropriate for crypto stuff. This second function can be used at Python startup to replace what is done currently.

It is most likely perfectly fine if Python blocks when explicitly asked to generate cryptographically secure random numbers. But not when simply starting the interpreter.