Small doc fix.

PythonistaGuild · Jan 21, 2020 · 258b90a · 258b90a
1 parent 84f54a4
commit 258b90a
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/twitchio/ext/commands/bot.py b/twitchio/ext/commands/bot.py
@@ -254,6 +254,7 @@ async def handle_checks(self, context):
 
     def load_module(self, name: str):
         """Method which loads a module and it's cogs.
+
         Parameters
         ------------
         name: str
@@ -278,7 +279,11 @@ def add_cog(self, cog):
         if not isinstance(cog, Cog):
             raise InvalidCog('Cogs must derive from "commands.Cog".')
 
+        if cog.name in self._cogs:
+            raise InvalidCog(f'Cog "{cog.name}" has already been loaded.')
+
         cog._load_methods(self)
+        self._cogs[cog.name] = cog
 
     async def global_before_invoke(self, ctx):
         """|coro|