Refactor manage.py to reflect django 5.0

manage.py

@@ -1,31 +1,26 @@
 #!/usr/bin/env python
-"""
-Django administration utility.
-"""
-
-from __future__ import absolute_import, unicode_literals
-
+"""Django's command-line utility for administrative tasks."""
 import os
 import sys
 
 PWD = os.path.abspath(os.path.dirname(__file__))
 
-if __name__ == '__main__':
-    os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'test_settings')
+
+def main():
+    """Run administrative tasks."""
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "test_settings")
     sys.path.append(PWD)
+
     try:
-        from django.core.management import execute_from_command_line  # pylint: disable=wrong-import-position
-    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  # pylint: disable=unused-import, wrong-import-position
-        except ImportError:
-            raise ImportError(
-                "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
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "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?"
+        ) from exc
     execute_from_command_line(sys.argv)
+
+
+if __name__ == "__main__":
+    main()