4 min read
Code Organization
Prerequisites: Modules
As a project grows past one file, split it into modules grouped by
responsibility, rather than one increasingly long main.py.
project/
main.py
models.py
services.py
tests/
test_services.py
main.py then imports what it needs: from services import send_email.
A useful rule of thumb: if a file is doing two unrelated things, split it
into two files.