Python Version: 2.7.5
Django Version: 1.10
When I type nohup python manage.py runserver 0.0.0.0:9001 it shows
nohup python manage.py runserver 0.0.0.0:9001
I ran into this error when trying to install Django-Guardian. Instead of downgrading Django, you can install the latest version of Django-Guardian. Try,
pip install 'django-guardian>=1.4.6'
This resolved the issue for me.