Console Progress Bar on python

progress_bar.py

import sys

class ProgressBar(object):

    def __init__(self, total, prefix='', suffix='', decimals=1, bar_length=100):
        """
        Call in a loop to create terminal progress bar
        :param total: total iterations
        :param prefix: prefix string
        :param suffix: suffix string
        :param decimals: positive number of decimals in percent complete
        :param bar_length: character length of bar
        """
        self.iteration = 0
        self.total = total
        self.prefix = prefix
        self.suffix = suffix
        self.decimals = decimals
        self.bar_length = bar_length
        self.show()

    def __iter__(self):
        return self

    def next(self):
        if self.iteration >= self.total:
            raise StopIteration
        self.iteration += 1
        self.show()

    def show(self):
        format_str = "{0:." + str(self.decimals) + "f}"
        percents = format_str.format(100 * (self.iteration / float(self.total)))
        filled_length = int(round(self.bar_length * self.iteration / float(self.total)))
        bar = '█' * filled_length + '-' * (self.bar_length - filled_length)
        sys.stdout.write('\r%s |%s| %s%s %s' % (self.prefix, bar, percents, '%', self.suffix)),
        sys.stdout.flush()
        if self.iteration == self.total:
            sys.stdout.write('\n')
            sys.stdout.flush()