Have every class inherit from object.

evennia/players/admin.py

@@ -2,6 +2,7 @@
 # This sets up how models are displayed
 # in the web admin interface.
 #
+from builtins import object
 
 from django import forms
 from django.conf import settings
@@ -19,7 +20,7 @@ class PlayerDBChangeForm(UserChangeForm):
     Modify the playerdb class.
 
     """
-    class Meta:
+    class Meta(object):
         model = PlayerDB
         fields = '__all__'
 
@@ -54,7 +55,7 @@ class PlayerDBCreationForm(UserCreationForm):
     Create a new PlayerDB instance.
     """
 
-    class Meta:
+    class Meta(object):
         model = PlayerDB
         fields = '__all__'
 
@@ -86,7 +87,7 @@ class PlayerForm(forms.ModelForm):
     Defines how to display Players
 
     """
-    class Meta:
+    class Meta(object):
         model = PlayerDB
         fields = '__all__'
 

evennia/players/models.py

@@ -15,6 +15,7 @@ persistently store attributes of its own. This is ideal for extra
 account info and OOC account configuration variables etc.
 
 """
+from builtins import object
 
 from django.conf import settings
 from django.db import models
@@ -100,7 +101,7 @@ class PlayerDB(TypedObject, AbstractUser):
     __defaultclasspath__ = "evennia.players.players.DefaultPlayer"
     __applabel__ = "players"
 
-    class Meta:
+    class Meta(object):
         verbose_name = 'Player'
 
     # alias to the objs property