How to create a simple progress bars in Python

This example will show you how to use a progress bar to perform some tasks using the tqdm library

First, you need to install the tqdm package by typing this line in your terminal

->pip install tqdm

Next, type type this code below in your editor

from tqdm import tqdm
 
for i in tqdm (range (100), desc="Loading..."):
    pass

Another way you can use alive-progress, this is the coolest progress bar ever

->pip install alive-progress

Next, Open your editor then enter the code below

from alive_progress.styles import showtime

showtime()

If you don't want to use external packages, you can handle your code by customizing the bar progress symbol "#", bar size, text prefix etc.

Python 3.6+

import sys
import time

def progressbar(it, prefix="", size=60, out=sys.stdout): # Python3.6+
    count = len(it)
    start = time.time()
    def show(j):
        x = int(size*j/count)
        remaining = ((time.time() - start) / j) * (count - j)        
        mins, sec = divmod(remaining, 60)
        time_str = f"{int(mins):02}:{sec:05.2f}"        
        print(f"{prefix}[{u'█'*x}{('.'*(size-x))}] {j}/{count} Est wait {time_str}", end='\r', file=out, flush=True)        
    for i, item in enumerate(it):
        yield item
        show(i+1)
    print("\n", flush=True, file=out)

[████████████████████████████.........................] 24/50 Est wait 00:05.38

or usage

import time    
for i in progressbar(range(15), "Computing: ", 40):
    time.sleep(0.1) # your handle code

Python 3.3+

import sys
def progressbar(it, prefix="", size=60, out=sys.stdout): # Python3.3+
    count = len(it)
    def show(j):
        x = int(size*j/count)
        print("{}[{}{}] {}/{}".format(prefix, "#"*x, "."*(size-x), j, count), 
                end='\r', file=out, flush=True)
    show(0)
    for i, item in enumerate(it):
        yield item
        show(i+1)
    print("\n", flush=True, file=out)

Python 2 (old version)

import sys
def progressbar(it, prefix="", size=60, out=sys.stdout):
    count = len(it)
    def show(j):
        x = int(size*j/count)
        out.write("%s[%s%s] %i/%i\r" % (prefix, u"#"*x, "."*(size-x), j, count))
        out.flush()        
    show(0)
    for i, item in enumerate(it):
        yield item
        show(i+1)
    out.write("\n")
    out.flush()

I also found a simple function that displays a progress with Python

To use it, just copy the lines in "def update_progress(progress)". Don't forget to import sys. Call it whenever you need to display or update the progress bar.

This works by sending the "\r" symbol directly to the console to move the cursor back to the starting point. "in" in python does not recognize the above symbol for this purpose, hence we need 'sys'

import time, sys

# update_progress() : Displays or updates a console progress bar
## Accepts a float between 0 and 1. Any int will be converted to a float.
## A value under 0 represents a 'halt'.
## A value at 1 or bigger represents 100%
def update_progress(progress):
    barLength = 10 # Modify this to change the length of the progress bar
    status = ""
    if isinstance(progress, int):
        progress = float(progress)
    if not isinstance(progress, float):
        progress = 0
        status = "error: progress var must be float\r\n"
    if progress < 0:
        progress = 0
        status = "Halt...\r\n"
    if progress >= 1:
        progress = 1
        status = "Done...\r\n"
    block = int(round(barLength*progress))
    text = "\rPercent: [{0}] {1}% {2}".format( "#"*block + "-"*(barLength-block), progress*100, status)
    sys.stdout.write(text)
    sys.stdout.flush()


# update_progress test script
print "progress : 'hello'"
update_progress("hello")
time.sleep(1)

print "progress : 3"
update_progress(3)
time.sleep(1)

print "progress : [23]"
update_progress([23])
time.sleep(1)

print ""
print "progress : -10"
update_progress(-10)
time.sleep(2)

print ""
print "progress : 10"
update_progress(10)
time.sleep(2)

print ""
print "progress : 0->1"
for i in range(101):
    time.sleep(0.1)
    update_progress(i/100.0)

print ""
print "Test completed"
time.sleep(10)

When you execute the program you can see it as show below

progress : 'hello'
Percent: [----------] 0% error: progress var must be float
progress : 3
Percent: [##########] 100% Done...
progress : [23]
Percent: [----------] 0% error: progress var must be float

progress : -10
Percent: [----------] 0% Halt...

progress : 10
Percent: [##########] 100% Done...

progress : 0->1
Percent: [##########] 100% Done...
Test completed