How can I specify optional dependencies using setup.py and extra_requires?

Question

Is there a way to specify optional dependencies when using python setup.py develop?

For example, say I have this package:

pip install openwisp-utils[users]

How can I install openwisp-utils for development by telling setuptools to install the optional dependencies listed in extra_requires['users']?

Answer 1

I found an alternative to python setup.py develop (which unfortunately doesn't seem to support extra_requires):

pip install -e .[users]