Simple progress bar in Python 3.6

progressbar.py

#!/usr/bin/env python3
"""Display a progressbar."""
import sys
import time


def progressbar(
    progress: int, total: int,
    percentage: bool = True, bar_width: int = 40,
    todo: str = ' ', done: str = '=',
    start: str = '[', end: str = ']'
) -> str:
    """
    Build a progressbar.

    Args:
        progress: The progress step.
        total: The total items count.
        bar_width: The progress bar's width.
        todo: Character to draw for progress yet to do.
        done: Character to draw for progress done.
        start: Character to draw at the beginning of the bar.
        end: Character to draw at the end of the bar.

    Returns:
        The progress bar to display.

    """
    percent = progress / total
    completed = round(abs(percent * bar_width - 2))
    bar = f'{start}{completed * done}{(bar_width - 2 - completed) * todo}{end}'
    if percentage:
        bar += f' {percent * 100:.2f}%'
    return bar


nb_items = 200

for count in range(nb_items):
    print(progressbar(count, nb_items), end='\r')
    time.sleep(0.01)

sys.stdout.write('\033[K')
print('Done!')