[commands] Fix bug in behaviour in the cog inspection methods.

discord/ext/commands/cog.py

@@ -156,15 +156,20 @@ class Cog(metaclass=CogMeta):
         return self
 
     def get_commands(self):
-        r"""Returns a :class:`tuple` of :class:`.Command`\s and its subclasses that are
+        r"""Returns a :class:`list` of :class:`.Command`\s that are
         defined inside this cog.
+
+        .. note::
+
+            This does not include subcommands.
         """
-        return self.__cog_commands__
+        return [c for c in self.__cog_commands__ if c.parent is None]
 
     def walk_commands(self):
         """An iterator that recursively walks through this cog's commands and subcommands."""
         from .core import GroupMixin
         for command in self.__cog_commands__:
+            if command.parent is None:
                 yield command
                 if isinstance(command, GroupMixin):
                     yield from command.walk_commands()

docs/ext/commands/cogs.rst

@@ -142,7 +142,7 @@ Inspection
 Since cogs ultimately are classes, we have some tools to help us inspect certain properties of the cog.
 
 
-To get a :class:`tuple` of commands, we can use :meth:`.Cog.get_commands`. ::
+To get a :class:`list` of commands, we can use :meth:`.Cog.get_commands`. ::
 
     >>> cog = bot.get_cog('Greetings')
     >>> commands = cog.get_commands()