Refs #26484 -- Avoided masking useful exceptions in manage.py's ImportError.

    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "{{ project_name }}.settings")

    try:

        from django.core.management import execute_from_command_line

    except ImportError:

        # The above import may fail for some other reason. Ensure that the

        # issue is really that Django is missing to avoid masking other

        # exceptions on Python 2.

        try:

            import django

        except ImportError:

            raise ImportError(

            "Couldn't import Django. Are you sure it's installed and available "

            "on your PATH environment variable? Did you forget to activate a "

            "virtual environment?"

                "Couldn't import Django. Are you sure it's installed and "

                "available on your PYTHONPATH environment variable? Did you "

                "forget to activate a virtual environment?"

            )

        raise

    execute_from_command_line(sys.argv)