python - 随着时间的推移，Tkinter 应用程序的响应速度变得越来越慢

Question

我的 TKinter 应用程序在长时间运行时遇到问题。该应用程序很简单，它通过 USB 接收串行数据并将其打印在 TK 窗口上。它可以在很长一段时间内正常工作，但是当放置半天或过夜时，它没有响应，并且我在顶部的应用程序栏上收到通用窗口(没有响应)错误，如果我尝试最小化或关闭窗口，它可能会最多需要 5~10 分钟即可完成。

我在 python 终端窗口上没有收到任何错误

我已将计算机上的电池和电源设置更改为不休眠和正常性能，但问题仍然没有解决

我已将代码精简到最低限度，看看它是否是解决问题的代码部分

这是我在下面发布的代码，希望有人能为我阐明这一点。

import tkinter as tk
from tkinter import *
from tkinter import ttk
import serial
import numpy 
import sys


arduinoData = serial.Serial('com7', 115200)  #Creating our serial object named arduinoData


# Main Tkinter application
class Application(Frame):

            # Init the variables & start measurements
        def __init__(self, master=None):
                Frame.__init__(self, master)
                root.title( "Dashboard")
                root.state('zoomed')

                self.grid(row=0, column=0, sticky="nsew")
                self.grid_rowconfigure(0, weight=1)
                self.grid_columnconfigure(0, weight=3)

                self.B1 = StringVar()

                self.createWidgets()
                self.pack()
                self.measure()

        # Create display elements
        def createWidgets(self):

                self.temperature = Label(self, text="", font=('Verdana', 20)).grid(row=5, column=0,padx=100,pady=200)

    # Read the incoming serial data and display it
        def measure(self):

                if(arduinoData.inWaiting()>0):                               #Wait till there is data to read

                        arduinoString = arduinoData.readline()               #read serial data
                        arduinoString =str(arduinoString,'utf-8')            #Removes the surrounding rubbish

                        self.B1.set(str(arduinoString))                      #Set the label to the received arduino data 
                        self.B1DO = Label(self, textvariable=self.B1, font=('Verdana', 15)).grid(row=0, column=0, sticky="nsew")

                arduinoData.flushOutput()                                    #Clear old data
                arduinoData.flushInput()

                self.after(1000,self.measure)                                #Wait 1 second between each measurement


# Create and run the GUI
root = Tk()
app = Application(master=root)
app.mainloop()

Answer 1

看起来您一直在创建新的 B1DO 标签，这可能会在您的应用程序中造成资源泄漏。尝试采用 self.B1DO 定义并将其放入 createWidgets 中，以便标签仅创建一次:

import tkinter as tk
from tkinter import *
from tkinter import ttk
import serial
import numpy 
import sys


arduinoData = serial.Serial('com7', 115200)  #Creating our serial object named arduinoData


# Main Tkinter application
class Application(Frame):

            # Init the variables & start measurements
        def __init__(self, master=None):
                Frame.__init__(self, master)
                root.title( "Dashboard")
                root.state('zoomed')

                self.grid(row=0, column=0, sticky="nsew")
                self.grid_rowconfigure(0, weight=1)
                self.grid_columnconfigure(0, weight=3)

                self.B1 = StringVar()

                self.createWidgets()
                self.pack()
                self.measure()

        # Create display elements
        def createWidgets(self):
                self.B1DO = Label(self, textvariable=self.B1, font=('Verdana', 15)).grid(row=0, column=0, sticky="nsew")
                self.temperature = Label(self, text="", font=('Verdana', 20)).grid(row=5, column=0,padx=100,pady=200)

    # Read the incoming serial data and display it
        def measure(self):

                if(arduinoData.inWaiting()>0):                               #Wait till there is data to read

                        arduinoString = arduinoData.readline()               #read serial data
                        arduinoString =str(arduinoString,'utf-8')            #Removes the surrounding rubbish

                        self.B1.set(str(arduinoString))                      #Set the label to the received arduino data 


                arduinoData.flushOutput()                                    #Clear old data
                arduinoData.flushInput()

                self.after(1000,self.measure)                                #Wait 1 second between each measurement


# Create and run the GUI
root = Tk()
app = Application(master=root)
app.mainloop()