Python progress indicator

progress.py

import os, sys, time

def _term_width():
    return int(os.popen('stty size').read().split()[1]) 

# `progress` is between 0 and 1
def print_progress_update(progress, pipe=sys.stdout):
    width = _term_width() - 3
    done = int(progress*width)
    pipe.write('\r|%s>%s|' % (done*'=',' '*(width-done)))
    
if __name__ == '__main__':
    for i in range(1,11):
        print_progress_update(0.1*i)
        sys.stdout.flush()
        time.sleep(0.5)