如果想通过docker安装kafka，可参考
Docker安装Kafka
生产者

import json
import time
import traceback

from datetime import datetime
from kafka import KafkaProducer
from kafka.errors import kafka_errors

producer = KafkaProducer(
    bootstrap_servers=['localhost:9092'],
    key_serializer=lambda k: json.dumps(k).encode(),
    value_serializer=lambda v: json.dumps(v).encode())

while True:
    i = datetime.strftime(datetime.now(), '%Y%m%d %H:%M:%S')
    future = producer.send(
        'kafka_demo',
        key='count_num',  # 同一个key值，会被送至同一个分区
        value=str(i),
        partition=0)  # 向分区1发送消息
    print("send {}".format(str(i)))
    time.sleep(3)
    try:
        future.get(timeout=10)  # 监控是否发送成功
    except kafka_errors:  # 发送失败抛出kafka_errors
        traceback.format_exc()

消费者

import json

from kafka import KafkaConsumer

consumer = KafkaConsumer(
    'kafka_demo',
    bootstrap_servers=':9092',
    group_id='test'
)
for message in consumer:
    print("receive, key: {}, value: {}".format(
        json.loads(message.key.decode()),
        json.loads(message.value.decode())
    )
    )

分为两个终端页面运行即可：
生产者打印：

消费者打印：