Refs #33476 -- Reformatted code with Black.

tests/multiple_database/routers.py

@@ -9,14 +9,17 @@ class TestRouter:
 
     def db_for_read(self, model, instance=None, **hints):
         if instance:
-            return instance._state.db or 'other'
-        return 'other'
+            return instance._state.db or "other"
+        return "other"
 
     def db_for_write(self, model, **hints):
         return DEFAULT_DB_ALIAS
 
     def allow_relation(self, obj1, obj2, **hints):
-        return obj1._state.db in ('default', 'other') and obj2._state.db in ('default', 'other')
+        return obj1._state.db in ("default", "other") and obj2._state.db in (
+            "default",
+            "other",
+        )
 
     def allow_migrate(self, db, app_label, **hints):
         return True
@@ -29,30 +32,30 @@ class AuthRouter:
 
     def db_for_read(self, model, **hints):
         "Point all read operations on auth models to 'default'"
-        if model._meta.app_label == 'auth':
+        if model._meta.app_label == "auth":
             # We use default here to ensure we can tell the difference
             # between a read request and a write request for Auth objects
-            return 'default'
+            return "default"
         return None
 
     def db_for_write(self, model, **hints):
         "Point all operations on auth models to 'other'"
-        if model._meta.app_label == 'auth':
-            return 'other'
+        if model._meta.app_label == "auth":
+            return "other"
         return None
 
     def allow_relation(self, obj1, obj2, **hints):
         "Allow any relation if a model in Auth is involved"
-        return obj1._meta.app_label == 'auth' or obj2._meta.app_label == 'auth' or None
+        return obj1._meta.app_label == "auth" or obj2._meta.app_label == "auth" or None
 
     def allow_migrate(self, db, app_label, **hints):
         "Make sure the auth app only appears on the 'other' db"
-        if app_label == 'auth':
-            return db == 'other'
+        if app_label == "auth":
+            return db == "other"
         return None
 
 
 class WriteRouter:
     # A router that only expresses an opinion on writes
     def db_for_write(self, model, **hints):
-        return 'writer'
+        return "writer"