<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def check_port(self, port):
 """ Attempts to bind to the requested communicator port, checking if it is already in use. """

        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        try:
            s.bind(("localhost", port))
        except socket.error:
            raise UnityWorkerInUseException(self.worker_id)
        finally:
            s.close()