A simple progress bar with carriage return. Reinventing the wheel.

progress_bar.py

import math, sys


def print_progress_bar(progress, length=40, fill_char='=', empty_char=' ',
        side_char='|'):
    '''
    Prints a simple progress bar using carriage returns.

    Args:
        progress (int): The progress done as a percentage 0-100
    Args (optional):
        length (int): How long the progress bar should be.
        fill_char (str): The character used to draw the bar.
        empty_char (str): The character used to draw the empty space.
        side_char (str): The character used to draw the boundaries of the bar.
    '''

    if progress < 0 or 100 < progress:
        raise RuntimeError('Progress may only be from 0-100.')

    not_prog = 100-progress

    done = fill_char  * int(  math.ceil( length*progress/100.0 ) )
    left = empty_char * int( math.floor( length*not_prog/100.0 ) )

    sys.stdout.write(
        '\r{0}{1}{2}{0} {3:3d}%'.format(side_char, done, left, progress)
    )
    sys.stdout.flush()