使用下面的代码,我尝试使用 asyncio 启动 2 个无限循环:
async def do_job_1():
while True :
print('do_job_1')
await asyncio.sleep(5)
async def do_job_2():
while True :
print('do_job_2')
await asyncio.sleep(5)
if __name__ == '__main__':
asyncio.run(do_job_1())
asyncio.run(do_job_2())
do_job_1块do_job_2,因为do_job_2从不打印 do_job_1。我犯了什么错误?
最终我试图转换kafka消费者代码:
from confluent_kafka import Consumer, KafkaError
settings = {
'bootstrap.servers': 'localhost:9092',
'group.id': 'mygroup',
'client.id': 'client-1',
'enable.auto.commit': True,
'session.timeout.ms': 6000,
'default.topic.config': {'auto.offset.reset': 'smallest'}
}
c = Consumer(settings)
c.subscribe(['mytopic'])
try:
while True:
msg = c.poll(0.1)
if msg is None:
continue
elif not msg.error():
print('Received message: {0}'.format(msg.value()))
elif msg.error().code() == KafkaError._PARTITION_EOF:
print('End of partition reached {0}/{1}'
.format(msg.topic(), msg.partition()))
else:
print('Error occured: {0}'.format(msg.error().str()))
except KeyboardInterrupt:
pass
finally:
c.close()
摘自https://www.confluence.io/blog/introduction-to-apache-kafka-for-python-programmers是并发的,这样我就可以并行处理 Kafka 消息。
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