A simple python progress bar

progressbar.py

# -*- coding: utf-8 -*-
from __future__ import print_function

import re
import sys


class ProgressBar(object):
    """
    A simple progress bar for terminal

    Simple example::

        progress = ProgressBar(20, width=25, fmt=ProgressBar.FULL)
        for i in range(20):
            progress()
            progress.current = i
            sleep(0.05)
        progress.done()

        # ==> [=====                    ]  4/20 ( 20%) 16 to go

    """
    DEFAULT = 'Progress: %(bar)s %(percent)3d%%'
    FULL = '%(bar)s %(current)d/%(total)d (%(percent)3d%%) %(remaining)d to go'
    
    def __init__(self, total, width=40, fmt=DEFAULT, symbol='=',
                 output=sys.stderr):
        assert len(symbol) == 1
        assert total >= 0
        assert width >= 0
        
        self.total = total
        self.width = width
        self.symbol = symbol
        self.output = output
        self.fmt = re.sub(r'(?P<name>%\(.+?\))d',
                             r'\g<name>%dd' % len(str(total)), fmt)
                             
        self.current = 0
        
    def __call__(self):
        percent = self.current / float(self.total)
        size = int(self.width * percent)
        remaining = self.total - self.current
        bar = '[' + self.symbol * size + ' ' * (self.width - size) + ']'
        
        args = {
            'total': self.total,
            'bar': bar,
            'current': self.current,
            'percent': percent * 100,
            'remaining': remaining
        }   
        print('\r' + self.fmt % args, file=self.output, end='')
        
    def done(self):
        self.current = self.total
        self()
        print('', file=self.output)

Nice job