code: def unbind(self, exchange, source, routing_key='', nowait=True,
                 arguments={}, ticket=None, cb=None):
          '''
          Unbind an exchange from another.
          '''
          nowait = nowait and self.allow_nowait() and not cb
  
          args = Writer()
          args.write_short(ticket or self.default_ticket).\
              write_shortstr(exchange).\
              write_shortstr(source).\
              write_shortstr(routing_key).\
              write_bit(nowait).\
              write_table(arguments or {})
          self.send_frame(MethodFrame(self.channel_id, 40, 40, args))
  
          if not nowait:
              self._unbind_cb.append(cb)
              self.channel.add_synchronous_cb(self._recv_unbind_okf unbind(self, exchange, source, routing_key='', nowait=True,
                 arguments={}, ticket=None, cb=None):
          '''
          Unbind an exchange from another.
          '''
          nowait = nowait and self.allow_nowait() and not cb
  
          args = Writer()
          args.write_short(ticket or self.default_ticket).\
              write_shortstr(exchange).\
              write_shortstr(source).\
              write_shortstr(routing_key).\
              write_bit(nowait).\
              write_table(arguments or {})
          self.send_frame(MethodFrame(self.channel_id, 40, 40, args))
  
          if not nowait:
              self._unbind_cb.append(cb)
              self.channel.add_synchronous_cb(self._recv_unbind_ok)
docs: Unbind an exchange from another.