Nrthugu

Hello I am making a timer. Here is my code:

from tkinter import*

import time

Screen=Tk()

Screen.resizable(0,0)

myText=Label(Screen,text="Welcome To X Timer!",font=(None,50),bg="green")

myText.pack()

aText=Label(Screen,text="0:0",font=(None,30))

aText.pack()

def start_timer():

    x=1

    while(True):

        time.sleep(1)

        x=x+1

        itemconfigure(aText,text=x)

strBTN=Button(Screen,text="Start",bg="purple",font= 

("Helvetica",45),command=start_timer)

strBTN.pack()

Screen.mainloop()

But on line 14 is says: Error:itemconfigure is not defined. Please help!

It's unclear exactly what it is you're trying to do, but your start_timer function is an infinite busy loop that will hang your GUI, so I assume that's not it! Maybe you meant to call Tk.after?

def start_timer(x=0):

    x+=1

    Screen.after(1000, lambda x=x: start_timer(x))

    # 1000 is the time (in milliseconds) before the callback should be invoked again

    # lambda x=x... is the callback itself. It binds start_timer's x to the scope of

    # the lambda, then calls start_timer with that x.

    itemconfigure(aText,text=x)

I'm going out on a limb and say that you expect itemconfigure(aText, text=x) to change the text on the label? You should instead be using:

    ...

    aText.config(text=x)

To change the text of a Label you have to use Label's method config(). So, instead of itemconfigure(aText,text=x), do aText.config(text=x). I think itemconfigure() function doesn't exist.

Also, there are other problems. For example, if you define a function with an infinite loop as a button callback, the button will always remain pressed (buttons remain pressed till the callback finishes). That's why I recommend you to use Screen's method after() at the end of the callback, and make it execute the same function.
after() executes a function after the number of milliseconds entered, so Screen.after(1000, function) will pause the execution during a second and execute the function.
Also you can use s variable to store the seconds. When s equals 60, it resets to 0 and increases in 1 the number of minutes (m).
Here you have the code:

from tkinter import*



Screen=Tk()

Screen.resizable(0,0)



myText=Label(Screen,text="Welcome To X Timer!",font=(None,50),bg="green")

myText.pack()



aText=Label(Screen,text="0:0",font=(None,30))

aText.pack()



def start_timer():

    global s, m, aText, Screen

    aText.config(text = str(m) + ":" + str(s))

    s += 1

    if s == 60:

        s = 0

        m += 1

  Screen.after(1000,start_timer)



s = 0

m = 0



strBTN=Button(Screen,text="Start",bg="purple",font=("Helvetica",45),command=start_timer)

strBTN.pack()



Screen.mainloop()

This one should work (in my computer it works properly). If you don't understand something just ask it.