Find circular imports in Python

What is circular imports?

You could use python -vv to inspect import relations.

$ python -vv shell
>>> from api.models import Application
>>> from import signup


$ python -vv
>>> import os
>>> os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'streetvoice.settings')
>>> import django
>>> django.setup()
>>> from api.models import Application


Python 3.7 has new feature to show time for importing modules. This feature is enabled with -X importtime option or PYTHONPROFILEIMPORTTIME=1 environment variable.

$ python3.7 -X importtime -c "import pipenv"