When you add parent.py it is imported as a new module Modules are cached When you reload parent.py, Python will reload the module (thus update the byte code if the source file has changed) Now here's ...

Python Hot Reload starts the given program and reloads it whenever any file changes in the current directory or imported modules.

There's a sneaky danger involved with the Python import statement. Here's why it is a potential risk for enterprises and what they can do about it.