code: def start(self):
          
          self.proc = []
          for telldus, port in (
                  (TELLDUS_CLIENT, self.port_client),
                  (TELLDUS_EVENTS, self.port_events)):
              args = shlex.split(SOCAT_CLIENT.format(
                  type=telldus, host=self.host, port=port))
              self.proc.append(subprocess.Popen(
                  args,
                  stdin=subprocess.DEVNULL,
                  stderr=subprocess.DEVNULL,
                  stdout=subprocess.DEVNULL
              ))
docs: Start client.