我就廢話不多說了，直接上代碼吧！

# -*- coding:utf8 -*-

import paho.mqtt.client as mqtt

from multiprocessing import Process, Queue

import time, random, os

import camera_person_num

MQTTHOST = "172.19.4.4"

MQTTPORT = 1883

mqttClient = mqtt.Client()

q = Queue()

# 連接MQTT服務器

def on_mqtt_connect():

mqttClient.connect(MQTTHOST, MQTTPORT, 60)

mqttClient.loop_start()

# 消息處理函數

def on_message_come(lient, userdata, msg):

# print(msg.topic + ":" + str(msg.payload.decode("utf-8")))

q.put(msg.payload.decode("utf-8")) # 放入隊列

print("產生消息", msg.payload.decode("utf-8"))

# 消息處理開啟多進程

# p = Process(target=talk, args=("/camera/person/num/result", msg.payload.decode("utf-8")))

# p.start()

def consumer(q, pid):

print("開啟消費序列進程", pid)

while True:

msg = q.get()

# p = Process(target=talk, args=("/camera/person/num/result", msg, pid))

# p.start()

talk("/camera/person/num/result", msg, pid)

# subscribe 消息訂閱

def on_subscribe():

mqttClient.subscribe("test123", 1) # 主題為"test"

mqttClient.on_message = on_message_come # 消息到來處理函數

# publish 消息發布

def on_publish(topic, msg, qos):

mqttClient.publish(topic, msg, qos);

# 多進程中發布消息需要重新初始化mqttClient

def talk(topic, msg, pid):

cameraPsersonNum = camera_person_num.CameraPsersonNum(msg)

t_max, t_mean, t_min = cameraPsersonNum.personNum()

# time.sleep(20)

print("消費消息", pid, msg)

mqttClient2 = mqtt.Client()

mqttClient2.connect(MQTTHOST, MQTTPORT, 60)

mqttClient2.loop_start()

mqttClient2.publish(topic, '{"max":' + str(t_max) + ',"mean":' + str(t_mean) + ',"min:"' + t_min + '}', 1)

mqttClient2.disconnect()

def main():

on_mqtt_connect()

on_subscribe()

for i in range(1, 3):

c1 = Process(target=consumer, args=(q, i))

c1.start()

while True:

pass

if __name__ == '__main__':

main()

以上這篇python 多進程隊列數據處理詳解就是小編分享給大家的全部內容了，希望能給大家一個參考，也希望大家多多支持python博客。

總結

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