The django.db.backends.postgresql_psycopg2 module is deprecated in favor of django.db.backends.postgresql. It’s been an alias since Django 1.9

evennia/utils/picklefield.py

@@ -268,7 +268,7 @@ class PickledObjectField(models.Field):
         """
         if value is not None and not isinstance(value, PickledObject):
             # We call force_str here explicitly, so that the encoded string
-            # isn't rejected by the postgresql_psycopg2 backend. Alternatively,
+            # isn't rejected by the postgresql backend. Alternatively,
             # we could have just registered PickledObject with the psycopg
             # marshaller (telling it to store it like it would a string), but
             # since both of these methods result in the same value being stored,

evennia/utils/utils.py

@@ -1036,7 +1036,7 @@ def uses_database(name="sqlite3"):
     shortcut to having to use the full backend name.
 
     Args:
-        name (str): One of 'sqlite3', 'mysql', 'postgresql_psycopg2'
+        name (str): One of 'sqlite3', 'mysql', 'postgresql'
         or 'oracle'.
 
     Returns: