Could anyone tell me where the module for loading Python source files is located? I want to modify it to implement my own decryption functionality.

[bonusslot666-blip]

I want to implement a file encryption and publishing feature for a Python project by modifying the file loading module in the PyPy source code to decrypt encrypted .py files when they are loaded. The version of the source code I am using is: pypy3.11-v7.3.20-src. I have tried several times but haven't been able to find the exact place to make the modifications. I would appreciate your help with this. Thank you very much!