@property
    def synchronous(self):
        """Returns a boolean indicating whether this tasks runs synchronously
           (True) or asynchronously (False)."""
        sv = self._json_struct['executionType']
        if sv == 'esriExecutionTypeSynchronous':
            return True
        elif sv == 'esriExecutionTypeAsynchronous':
            return False
        raise ValueError(sv % "Unknown synchronous value: %r")
dataset/ETHPy150Open jasonbot/arcrest/arcrest/server.py/GPService.synchronous/swapped operands of `%`