Use list* from future.utils.

dict.keys() -> list(dict)
dict.values() -> listvalues(dict)
dict.tems() -> listitems(dict)

evennia/contrib/tutorial_world/objects.py

@@ -18,6 +18,7 @@ Weapon
 WeaponRack
 
 """
+from future.utils import listvalues
 
 import random
 
@@ -523,7 +524,7 @@ class CmdShiftRoot(Command):
         self.obj.db.root_pos = root_pos
 
         # Check victory condition
-        if root_pos.values().count(0) == 0: # no roots in middle position
+        if listvalues(root_pos).count(0) == 0: # no roots in middle position
             # This will affect the cmd: lock of CmdPressButton
             self.obj.db.button_exposed = True
             self.caller.msg("Holding aside the root you think you notice something behind it ...")