progress_bar.py

import sys
import math
import time


def progress_bar(progress, col_width=80):
    """
    Text progress bar in command line.
    Pre-condition: the cursor is at a new line.
    Post-condition: the cursor is at the end of the same line.
    """
    progress_width = col_width - 10
    finished = int(progress * progress_width)
    progress_str = '#'*finished + '-'*(progress_width-finished)
    sys.stdout.write('\r[%s](%.1f%%)' % (progress_str, 100*progress))
    sys.stdout.flush()


limit = 42
print
for i in range(limit):
    progress = 1.0*(i+1)/limit
    progress_bar(progress)
    time.sleep(0.1)
print