def fetchone(self):
        try:
            return next(self.results)
        except StopIteration:
            return None
Asynchronously read a number of bytes.
dataset/ETHPy150Open django-salesforce/django-salesforce/salesforce/backend/query.py/CursorWrapper.fetchone--crossover with--dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/iostream.py/BaseIOStream.read_bytes