progress_bar.py

# native Python progress bar without using any library
from time import sleep


def progress_bar(percent=0, width=30):
    left = width * percent // 100
    right = width - left
    print('\r[', '#' * left, ' ' *right, ']', f'{percent: .0f}%', sep='', end='', flush=True)

if __name__ == "__main__":
    for i in range(101):
        progress_bar(i)
        sleep(1)