kafka生产者示例（kafka-python producer example）

import multiprocessingimport timefrom kafka import KafkaProducerdef worker(ch):    producer = KafkaProducer(bootstrap_servers='127.0.0.1:9092')    for i in range(1000):        time.sleep(0.01)        print 'produce msg', i        producer.send('publish_msg', ch * 1024)if __name__ == '__main__':    p1 = multiprocessing.Process(target=worker, args=('1',))    p2 = multiprocessing.Process(target=worker, args=('2',))    p1.start()    p2.start()

同时创建两个子进程，两个消费者并行向kafka发送消息。
topic为test_msg。