Tkinter调用中的异常

2024-03-28 23:00:25 发布

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我编写了一个代码来读取arduino中的模拟值,并在一个简单的Python应用程序中监视结果,但是当我在我的应用程序中单击“开始”按钮时,出现了以下错误:Tkinter回调中出现异常 回溯(最近一次呼叫)

编译器在这个instraction中找到了错误:analoglabel.config(text=str(pin.read())

抱歉,我无法填写所有的错误信息

这是我的代码:

import pyfirmata
from pyfirmata import util
import Tkinter
from time import sleep

def press():
  it = util.Iterator(board)
  it.start()
  while True:
    if flag.get():
        analoglabel.config(text=str(pin.read()))
        analoglabel.update_idletasks()
        root.update()
    else:
        break
    board.exit()
    root.destroy()

def exit_command():
 flag.set(False)

port = '/dev/ttyACM0'
board = pyfirmata.Arduino(port)
sleep(5)
pin = board.get_pin('a:0:i')

root = Tkinter.Tk()
root.title("Analog read by hamzawi")
root.minsize(300, 50)

startbutton = Tkinter.Button(root,
                          text="START",
                          command=press)
startbutton.grid(column=1, row=2)

exitbutton = Tkinter.Button(root,
                        text="EXIT",
                        command=exit_command)
exitbutton.grid(column=2, row=2)

label = Tkinter.Label(root,
                   text="The value is: ")
label.grid(column=1, row=1)

analoglabel = Tkinter.Label(root, text=" ")
analoglabel.grid(column=2, row=1)

flag = Tkinter.BooleanVar()
flag.set(True)

root.mainloop()

拜托,我需要帮助!!非常感谢


Tags: textimportboardreadtkinterexitpincolumn
2条回答

第一次通过你的循环一切都很好。然后销毁根窗口。下一次在循环中尝试配置label小部件时,它已被销毁。

是否确实要销毁循环中的根窗口?

from tkinter import *

import sys

import tkinter

from time import sleep

import pyfirmata # not in wondows

from pyfirmata import util # not in wondows

def press():

  it = util.Iterator(board)

  it.start()

  while True:

    if flag.get():

        analoglabel.config(text=str(pin.read()))

        analoglabel.update_idletasks()

        root.update()

    else:

        break

    board.exit()

    root.destroy()

def exit_command():

 flag.set(False)

port = '/dev/ttyACM0'

board = pyfirmata.Arduino(port) # not in wondows

sleep(5)

pin = board.get_pin('a:0:i') # not in wondows

root = tkinter.Tk()

root.title("Analog read by hamzawi")

root.minsize(300, 50)

start_button = tkinter.Button(root, text='start', command=press)

start_button.grid(column=1, row=2)

exit_button = tkinter.Button(root, text="EXIT", command=exit_command)

exit_button.grid(column=2, row=2)

label = tkinter.Label(root,

                   text="The value is: ")

label.grid(column=1, row=1)

analoglabel = tkinter.Label(root, text=" ")

analoglabel.grid(column=2, row=1)

flag = tkinter.BooleanVar()

flag.set(True)

root.mainloop()

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