python tkinter-update label while program running (progress bar from 0% to 100%)

python tkinter update label while program running (progress bar from 0% to 100%)
Update continuously even you have button and button is clicked.
Just put config text and root.update() inside function def.

The progress bar:

Program:

from tkinter import *

import time

root=Tk()

a=Label(root,fg="blue")

a.pack()

a.config(text="processing 10%")

root.update()

time.sleep(1)

#program

a.config(text="processing 30%")

root.update()

time.sleep(1)

#program

a.config(text="processing 60%")

root.update()

time.sleep(1)

#program

a.config(text="processing 100%")

root.update()

time.sleep(1)

root.mainloop()

Python tkinter update label progress bar while button is clicked.

The progress bar(with button):

Program:
from tkinter import *
import time

root=Tk()

a=Label(root,fg="blue")
a.pack()

def run():
 a.config(text="processing 10%")
 root.update()
 time.sleep(1)
 #program
 a.config(text="processing 30%")
 root.update()
 time.sleep(1)
 #program
 a.config(text="processing 60%")
 root.update()
 time.sleep(1)
 #program
 a.config(text="processing 100%")
 root.update()
 time.sleep(1)

b=Button(root,text="run",command=run)
b.pack()



root.mainloop()