def _validate_rpc_port(port):
 if (not port):
  raise NetworkControllerError(desc='Invalid rpc port number.')
 if isinstance(port, str):
  port = int(port)
 if (port <= 0):
  raise NetworkControllerError(desc=('Invalid rpc port number %s' % port))
 return port

def _validate_rpc_port ( port ) : if ( not port ) : raise NetworkControllerError ( desc = 'Invalid rpc port number.' ) if isinstance ( port , str ) : port = int ( port ) if ( port <= 0 ) : raise NetworkControllerError ( desc = ( 'Invalid rpc port number %s' % port ) ) return port
validates give port for use as rpc server port .