ModuleNotFoundError when installing package from github

[didoarellano]

Importing django in setup.py to grab the version string blows up when installing this package from github and django isn't installed yet.

Steps to reproduce

git clone https://github.com/didoarellano/fluffy-barnacle.git`
cd fluffy-barnacle
mkvirtualenv -p /usr/bin/python3.6 fluffy-barnacle
pip install -r requirements.txt

Result:

The fix

It's likely not the right way to do it but I moved the version string from hashid_field/__init__.py to setup.py so that django is no longer needed just to get the version. If there's a correct way of fixing this just point me in the right direction.

Installing from the "fixed" branch succeeds:
pip install -r fixed_requirements.txt

[nshafer]

Thanks for the patch. So I found this page describing different methods to fix this issue. Then I looked at how some different modules do it, and decided to copy the method from django-rest-framework as I'm sure they have tested it extensively. Thanks!