Question

我正在尝试创建一个从mqtt服务器接收数据的python程序。它接收两个参数之一，即值（'val'）和开关数据（'s'）。因此，当开关断开时（即s = 0），数据不断传来，并且使用matplotlib动画功能实时绘制了绘图。当开关关闭时（即s = 1），需要中断输入数据，并且程序必须停止执行并关闭所有窗口，包括动画人物和命令提示终端。我尝试在plt.close（'all'）之后使用exit（）函数，但是在plt.close（'all'）之后似乎没有执行任何操作。该图已关闭，但终端未关闭。我已在此处附上代码供您参考。

import paho.mqtt.client as mqttClient
import time
import json
import matplotlib.pyplot as plt
import matplotlib.animation as animation
import array as arr

fig = plt.figure()
ax = fig.add_subplot(1, 1, 1, title = 'Analog Reading', ylabel = 'analog value', xlabel = 'count')

xs = []
ys = []
fields = ['Xaxis']

def on_connect(client, userdata, flags, rc):
    if rc == 0:
        global Connected                
        Connected = True                
    else:
        print("Connection failed")

def on_message(client, userdata, message):
    global val, s
    msg = json.loads(message.payload)
    val = msg['V']
    s = msg['S']
    if s==1:
        shutdown()

def shutdown():
    ani.event_source.stop()
    plt.close('all')
    exit()

def animate(i, xs, ys):
    xs.append(i)
    ys.append(val)
    ax.plot(xs,ys,'C1')

Connected = False   

broker_address= "10.56.10.173"  #Broker address
port = 1883                         #Broker port


client = mqttClient.Client("ESP8266Client-")               #create new instance
client.on_connect= on_connect                      #attach function to callback
client.on_message= on_message                      #attach function to callback

client.connect(broker_address, port=port)          #connect to broker

client.loop_start()        #start the loop

while Connected != True:#Wait for connection
    time.sleep(0.1)

client.subscribe("outTopic")
ani = animation.FuncAnimation(fig, animate, fargs=(xs, ys), interval=200)
plt.show()
try:
    while True:
        time.sleep(1)

except KeyboardInterrupt:
    client.disconnect()
    client.loop_stop()
    exit()

如何使用python 3在Windows中关闭终端窗口

0 个答案: