Question

所以我有一个程序可以获取最新的Outlook电子邮件，并在按下按钮后显示它。我想要做的是摆脱按钮，让answer_label自动运行计时器功能，始终显示电子邮件。有什么建议吗？

import win32com.client
import os
import threading # use the Timer
import tkinter

from tkinter import Tk, Label, Button

class myGUI:

    def timer(self):

        import pythoncom           # These 2 lines are here because COM library
        pythoncom.CoInitialize()   # is not initialized in the new thread

        outlook = win32com.client.Dispatch("Outlook.Application").GetNamespace("MAPI")

        inbox = outlook.GetDefaultFolder(6) # "6" refers to the index of a folder - in this case,
                                            # the inbox. You can change that number to reference
                                            # any other folder

        messages = inbox.Items
        message = messages.GetLast()
        body_content = message.Body


        self.answer_label['text'] = (body_content) # orginally used body_content.encode("utf-8") to fixed character encoding issue
                             # caused by Windows CMD.  But then figured out you can type 'chcp 65001' in cmd
        threading.Timer(5, self.timer).start() # refresh rate goes here


    def __init__(self, master):
        self.master = master
        master.title("CheckStat")


        self.answer_label = Label(master, text='')
        self.answer_label.place(height=300, width=300)


        self.greet_button = Button(master, text="Start", command=self.timer)
        self.greet_button.place(height=20, width=100)


    def greet(self):
        print("Greetings!")


root = Tk()
my_gui = myGUI(root)
root.mainloop()

Answer 1

您不需要显式按钮来运行计时器功能。只需在init中调用它即可。这段代码适合我（它显示时间而不是电子邮件）。

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import datetime
import threading # use the Timer
from tkinter import Tk, Label, Button

class myGUI:

    def timer(self):
        self.answer_label['text'] = datetime.datetime.now()
        threading.Timer(5, self.timer).start()

    def __init__(self, master):
        self.master = master
        master.title("CheckStat")

        self.answer_label = Label(master, text='')
        self.answer_label.place(height=300, width=300)

        self.timer()

root = Tk()
my_gui = myGUI(root)
root.mainloop()

在多线程应用程序中使用tkinter时要小心。

有没有办法让标签在Python Tkinter中运行一个函数？

1 个答案: