Simple python progress bar python2 and 3

progressBar.py

import sys

class Progress:
    """
        Simple progress bar
    """

    def __init__(self, total = 100, width=50):
        self.total = total
        self.width = width


    def update(self, value):
        if not sys.stdout.isatty():
            # IT IS NOT A TERMINAL!
            # DON'T WRITE
            return
        if value <= self.total:
            self.value = value
            self._repaint()

    def _repaint(self):
        percent = round( float(self.value) / float(self.total), 2)

        bar = int( percent * self.width )
        percent = int( percent * 100 )

        barstring = [ '#' if i <= bar else ' '  for i in range(self.width) ]
        barstring = ''.join(barstring)

        sys.stdout.write('\r[' + barstring + ']' + ' ' + str(percent) + '%')
        sys.stdout.flush()
        if percent == 100:
            sys.stdout.write('\n')

if __name__ == '__main__':
    """
        Progress bar tester
    """
    bar = Progress()
    import time
    for i in range(101):
        time.sleep(0.05)
        bar.update(i)