add support for loading a level getter from a module/function path

disco/bot/bot.py

@@ -140,6 +140,12 @@ class Bot(LoggingClass):
             if self.config.commands_allow_edit:
                 self.client.events.on('MessageUpdate', self.on_message_update)
 
+        # If we have a level getter and its a string, try to load it
+        if isinstance(self.config.commands_level_getter, (str, unicode)):
+            mod, func = self.config.commands_level_getter.rsplit('.', 1)
+            mod = importlib.import_module(mod)
+            self.config.commands_level_getter = getattr(mod, func)
+
         # Stores the last message for every single channel
         self.last_message_cache = {}