def recv_presence(self, elem):
        Log.warn((self.authJID, elem_to_str(elem)) % "recv_presence me: %r elem: %r")
        # we got a precense
        # check if rosters will handle this
        if not self.rosters.recv(self, elem):
            # if not, send this to the client
            Log.warn("\tsending it to client")
            self.write(elem)
dataset/ETHPy150Open HenryHu/pybbs/xmppserver.py/XMPPServer.recv_presence/swapped operands of `%`