Refactor test utilities and enhance ASGI settings

- Cleaned up and standardized assertions in ApiTestMixin for API response validation.
- Updated ASGI settings to use os.environ for setting the DJANGO_SETTINGS_MODULE.
- Removed unused imports and improved formatting in settings.py.
- Refactored URL patterns in urls.py for better readability and organization.
- Enhanced view functions in views.py for consistency and clarity.
- Added .flake8 configuration for linting and style enforcement.
- Introduced type stubs for django-environ to improve type checking with Pylance.

parks/management/commands/update_park_counts.py

@@ -1,34 +1,29 @@
 from django.core.management.base import BaseCommand
-from django.db.models import Count, Q
+from django.db.models import Q
 from parks.models import Park
 
+
 class Command(BaseCommand):
-    help = 'Update total_rides and total_roller_coasters counts for all parks'
+    help = "Update total_rides and total_roller_coasters counts for all parks"
 
     def handle(self, *args, **options):
         parks = Park.objects.all()
-        operating_rides = Q(status='OPERATING')
+        operating_rides = Q(status="OPERATING")
         updated = 0
 
         for park in parks:
             # Count total operating rides
             total_rides = park.rides.filter(operating_rides).count()
-            
+
             # Count total operating roller coasters
-            total_coasters = park.rides.filter(
-                operating_rides,
-                category='RC'
-            ).count()
-            
+            total_coasters = park.rides.filter(operating_rides, category="RC").count()
+
             # Update park counts
             Park.objects.filter(id=park.id).update(
-                total_rides=total_rides,
-                total_roller_coasters=total_coasters
+                total_rides=total_rides, total_roller_coasters=total_coasters
             )
             updated += 1
 
         self.stdout.write(
-            self.style.SUCCESS(
-                f'Successfully updated counts for {updated} parks'
-            )
+            self.style.SUCCESS(f"Successfully updated counts for {updated} parks")
         )