Progressbar widget in Tkinter | Python

The purpose of this widget is to reassure the user that something is happening. It can operate in one of two modes –
In determinate mode, the widget shows an indicator that moves from beginning to end under program control.
In indeterminate mode, the widget is animated so the user will believe that something is in progress. In this mode, the indicator bounces back and forth between the ends of the widget.

Syntax:

widget_object = Progressbar(parent, **options)

Code #1 In determinate mode

# importing tkinter module
from tkinter import * from tkinter.ttk import *

# creating tkinter window
root = Tk()

# Progress bar widget
progress = Progressbar(root, orient = HORIZONTAL,
              length = 100, mode = 'determinate')

# Function responsible for the updation
# of the progress bar value
def bar():
    import time
    progress['value'] = 20
    root.update_idletasks()
    time.sleep(1)

    progress['value'] = 40
    root.update_idletasks()
    time.sleep(1)

    progress['value'] = 50
    root.update_idletasks()
    time.sleep(1)

    progress['value'] = 60
    root.update_idletasks()
    time.sleep(1)

    progress['value'] = 80
    root.update_idletasks()
    time.sleep(1)
    progress['value'] = 100

progress.pack(pady = 10)

# This button will initialize
# the progress bar
Button(root, text = 'Start', command = bar).pack(pady = 10)

# infinite loop
mainloop()

Output:

Code #2: In indeterminate mode

# importing tkinter module
from tkinter import * from tkinter.ttk import *

# creating tkinter window
root = Tk()

# Progress bar widget
progress = Progressbar(root, orient = HORIZONTAL,
            length = 100, mode = 'indeterminate')

# Function responsible for the updation
# of the progress bar value
def bar():
    import time
    progress['value'] = 20
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 40
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 50
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 60
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 80
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 100
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 80
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 60
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 50
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 40
    root.update_idletasks()
    time.sleep(0.5)

    progress['value'] = 20
    root.update_idletasks()
    time.sleep(0.5)
    progress['value'] = 0


progress.pack(pady = 10)

# This button will initialize
# the progress bar
Button(root, text = 'Start', command = bar).pack(pady = 10)

# infinite loop
mainloop()

Output: