Question

I have a project structure like this…

app/
    main.py
    app/
        __init__.py
        boot.py
        server.py
        controllers/
            __init__.py
            home.py

The imports are…

# main.py
from app import server

# server.py
from . import boot

# boot.py
from . import controllers

# controllers/__init__.py
from . import home

# controllers/home.py
from .. import boot

Now all the imports are working except the last one. The error thrown is…

ImportError: cannot import name boot

What’s the problem? (I am using Python 3.2)

Answer 1

You are importing boot which is importing controllers, which is then asked to import home, and home then tries to import boot, but it wasn’t done importing yet. Don’t do this, you are creating a circular dependency here.

Also see Circular import dependency in Python