Python - Progress Bar

progress_bar.py

import sys

def progress_bar(list_size):
    # list_size takes an integer as parameter
    lst = range(list_size)
    for index, item in enumerate(lst):
        # List index starts from 0
        # Round position / size of list to 1 decimal place
        # 0.567777 => 0.57
        # Multiplied by 100 to give you the percentage!
        percent = int(round((index + 1) / len(lst), 2) * 100)
        # Round number to 1 significant figure
        # 56 => 60
        # Divide by 10 to get number of times to print
        times = int(round(percent, -1) / 10)
        sys.stdout.write("\r{0}% {1}".format(percent, 
                        '[' + '=' * times + ' ' * (10-times) + ']'))
        sys.stdout.flush()