当我打电话给另一个功能时，如何停止功能？使用tkinter python

Question

该程序是一款具有不同时区的简单手表 当我将时间从一个国家更改为另一个国家（按按钮）时，出现了问题，这两个功能继续同时工作，时间表重叠

from tkinter import *
from datetime import datetime
import pytz
import time

root = Tk()
root.title("Digital Watch")
root.geometry("450x150")
root.config(bg="#717b85")

#---------------(ARG)Clock function update

def updateARG():
    argentina_timezone = pytz.timezone("America/Buenos_Aires")
    argentina_hour = datetime.now(argentina_timezone)
    hour = argentina_hour.strftime('%H:%M:%S')
    date = argentina_hour.strftime('%A %d %B')


    country_screen.config(text="Argentina")

    watch_screen.config(text=hour)
    watch_screen.after(1000,updateARG)

    date_screen.config(text=date)

#---------------(MEX)Clock function update

def updateMEX():
    mexico_timezone = pytz.timezone("America/Mexico_City")
    mexico_hour = datetime.now(mexico_timezone)
    hour = mexico_hour.strftime('%H:%M:%S')
    date = mexico_hour.strftime('%A %d %B')


    country_screen.config(text="MEXICO")

    watch_screen.config(text=hour)
    watch_screen.after(1000,updateMEX)

    date_screen.config(text=date)

#---------------Labels  

country_screen = Label(root,text="",font=("Arial Narrow",15), bg="#717b85",fg="white")
country_screen.place(x=10, y= 40)
BotonARG=Button(root, text="ARG",bg="gold",fg="black",font=("Arial 
Narrow",15),relief="flat",command=updateARG)
BotonARG.place(x=370,y=0)
BotonMEX=Button(root, text="MEX",bg="gold",fg="black",font=("Arial 
Narrow",15),relief="flat",command=updateMEX)
BotonMEX.place(x=370,y=45)
BotonUSA=Button(root, text="USA",bg="gold",fg="black",font=("Arial 
Narrow",15),relief="flat")
BotonUSA.place(x=370,y=90)

watch_screen = Label(root,text="",justify="right", fg="#64fff6", bg="#717b85",font=("Arial Narrow",70))
watch_screen.pack()
date_screen = Label(root,text="",justify="right",font=("Arial Narrow",15), bg="#717b85")
date_screen.pack()

root.mainloop()

Answer 1

您可以使用after_cancel的方法：
在这里您可以找到如何使用它

您只需要在def中启动（）之后启动之前调用此方法

Answer 2

由于更新...功能几乎相同，我建议留下一个。

from tkinter import *
from datetime import datetime
import pytz
import time
from functools import partial

id_after = None


#---------------Clock function update

def time_config(time_zone, text_timezone):
    global id_after
    time_hour = datetime.now(time_zone)
    hour = time_hour.strftime('%H:%M:%S')
    date = time_hour.strftime('%A %d %B')
    text = text_timezone.split('/')[1]
    country_screen.config(text=text)
    watch_screen.config(text=hour)
    date_screen.config(text=date)
    id_after = watch_screen.after(1000, time_config, time_zone, text_timezone)

def time_zone(text_timezone):

    if id_after is not None:
        watch_screen.after_cancel(id_after)  # Stop timer on change timezone
    time_zone = pytz.timezone(text_timezone)
    time_config(time_zone, text_timezone)





root = Tk()
root.title("Digital Watch")
root.geometry("450x150")
root.config(bg="#717b85")

country_screen = Label(root,text="",font=("Arial Narrow",15), bg="#717b85",fg="white")
country_screen.place(x=10, y= 40)
BotonARG=Button(root, text="ARG", bg="gold", fg="black", font=("Arial Narrow",15),
                relief="flat", command=partial(time_zone, "America/Buenos_Aires"))
BotonARG.place(x=370,y=0)
BotonMEX=Button(root, text="MEX", bg="gold", fg="black", font=("Arial Narrow",15),
                relief="flat", command=partial(time_zone, "America/Mexico_City"))
BotonMEX.place(x=370,y=45)
BotonUSA=Button(root, text="USA",bg="gold",fg="black",font=("Arial Narrow",15),relief="flat")
BotonUSA.place(x=370,y=90)

watch_screen = Label(root,text="",justify="right", fg="#64fff6", bg="#717b85",font=("Arial Narrow",70))
watch_screen.pack()
date_screen = Label(root,text="",justify="right",font=("Arial Narrow",15), bg="#717b85")
date_screen.pack()

root.mainloop()