How to send message to a chatroom using xmpppy?

I've successfully sent message to individual user. How can I send message to a room? I'm trying the following code:

cl.send(xmpp.Message('99999_myroom@chat.hipchat.com', 'test message', typ='groupchat'))

Also, I'm sending this message without sending presence.

Solution

To send a message to a room, you must join the room first. From XEP-0045, section 7.2.2:

<presence to='99999_myroom@chat.hipchat.com/my_nickname'>
  <x xmlns='http://jabber.org/protocol/muc'/>
</presence>

Then your message should work.