docs: def validate_django_compatible_with_python():
      """
      Verify Django 1.11 is present if Python 2.7 is active
  
      Installation of pinax-cli requires the correct version of Django for
      the active Python version. If the developer subsequently changes
      the Python version the installed Django may no longer be compatible.
      """
      python_version = sys.version[:5]
      django_version = django.get_version()
      if sys.version_info == (2, 7) and django_version >= "2":
          click.BadArgumentUsage("Please install Django v1.11 for Python {}, or switch to Python >= v3.4".format(python_version))