VoiceChannel.voice_members is now computed when needed.

discord/channel.py

@@ -174,20 +174,17 @@ class VoiceChannel(discord.abc.GuildChannel, Hashable):
         top channel is position 0.
     bitrate: int
         The channel's preferred audio bitrate in bits per second.
-    voice_members
-        A list of :class:`Members` that are currently inside this voice channel.
     user_limit: int
         The channel's limit for number of members that can be in a voice channel.
     """
 
-    __slots__ = ( 'voice_members', 'name', 'id', 'guild', 'bitrate',
-                  'user_limit', '_state', 'position', '_overwrites' )
+    __slots__ = ('name', 'id', 'guild', 'bitrate',  'user_limit',
+                 '_state', 'position', '_overwrites' )
 
     def __init__(self, *, state, guild, data):
         self._state = state
         self.id = int(data['id'])
         self._update(guild, data)
-        self.voice_members = []
 
     def __repr__(self):
         return '<VoiceChannel id={0.id} name={0.name!r} position={0.position}>'.format(self)
@@ -200,6 +197,17 @@ class VoiceChannel(discord.abc.GuildChannel, Hashable):
         self.user_limit = data.get('user_limit')
         self._fill_overwrites(data)
 
+    @property
+    def voice_members(self):
+        """Returns a list of :class:`Member` that are currently inside this voice channel."""
+        ret = []
+        for user_id, state in self.guild._voice_states.items():
+            if state.channel.id == self.id:
+                member = self.guild.get_member(user_id)
+                if member is not None:
+                    ret.append(member)
+        return ret
+
     @asyncio.coroutine
     def edit(self, **options):
         """|coro|

discord/guild.py

@@ -164,23 +164,6 @@ class Guild(Hashable):
             self._voice_states[user_id] = after
 
         member = self.get_member(user_id)
-        if member is not None:
-            old = before.channel
-            # update the references pointed to by the voice channels
-            if old is None and channel is not None:
-                # we joined a channel
-                channel.voice_members.append(member)
-            elif old is not None:
-                try:
-                    # we either left a channel or switched channels
-                    old.voice_members.remove(member)
-                except ValueError:
-                    pass
-                finally:
-                    # we switched channels
-                    if channel is not None:
-                        channel.voice_members.append(member)
-
         return member, before, after
 
     def _add_role(self, role):

discord/member.py

@@ -50,7 +50,7 @@ class VoiceState:
         Indicates if the user is currently deafened by their own accord.
     is_afk: bool
         Indicates if the user is currently in the AFK channel in the guild.
-    channel: Optional[Union[:class:`Channel`, :class:`PrivateChannel`]]
+    channel: :class:`VoiceChannel`
         The voice channel that the user is currently connected to. None if the user
         is not currently in a voice channel.
     """
@@ -70,6 +70,9 @@ class VoiceState:
         self.deaf = data.get('deaf', False)
         self.channel = channel
 
+    def __repr__(self):
+        return '<VoiceState self_mute={0.self_mute} self_deaf={0.self_deaf} channel={0.channel!r}>'.format(self)
+
 def flatten_user(cls):
     for attr, value in User.__dict__.items():
         # ignore private/special methods