def set_user_agent(self, agent):
		self.__user_agent = agent
Return how many bytes the in the outgoing buffer
dataset/ETHPy150Open aliyun/aliyun-openapi-python-sdk/aliyun-python-sdk-core/aliyunsdkcore/client.py/AcsClient.set_user_agent--crossover with--dataset/ETHPy150Open pyserial/pyserial/serial/serialwin32.py/Serial.out_waiting