Django Evolution provides a compatibility patch to enable

collections.Callable on Python 3.10 with Django <= 2.0. To check

whether to apply the patch, we were checking for the existence of

collections.Callable and the Django version.
The first check led to a deprecation warning on modern versions of

Python, which is annoying when running on a version of Django not

susceptible to the old imports. Instead, we now check the Django version

first, avoiding the warning.

Started up a dev server and saw that the warning no longer appeared.