How do I stop a function when I call another? using tkinter python-CodePudding

the program is a simple watch with different timezones The problem arises when I change the time from one country to the other (pressing the button), the two functions continue to work simultaneously and the schedules overlap

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()

CodePudding user response：

you can use the method after_cancel : Here you can find how to use it

You just have to call this method before launching after() in your defs

CodePudding user response：

You can try using return and then after that call another function. Return basically stops a specific function. So for example, if you wanted to stop updateMEX(), you would do something like:

def updateMEX():
    
    # Your Code

    return

CodePudding user response：

Since the update... functions are almost the same, I suggest leaving one.

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()