The Tor Browser / file revision

 # This Source Code Form is subject to the terms of the Mozilla Public

 # License, v. 2.0. If a copy of the MPL was not distributed with this

 # file, You can obtain one at http://mozilla.org/MPL/2.0/.

 # Text progress bar library, like curl or scp.

 import sys, datetime

 class ProgressBar(object):

     def __init__(self, label, limit, label_width=12):

         self.label = label

         self.limit = limit

         self.label_width = label_width

         self.cur = 0

         self.t0 = datetime.datetime.now()

         self.fullwidth = None

         self.barlen = 64 - self.label_width

         self.fmt = '\r%-' + str(label_width) + 's %3d%% %-' + str(self.barlen) + 's| %6.1fs'

     def update(self, value):

         self.cur = value

         pct = int(100.0 * self.cur / self.limit)

         barlen = int(1.0 * self.barlen * self.cur / self.limit) - 1

         bar = '='*barlen + '>'

         dt = datetime.datetime.now() - self.t0

         dt = dt.seconds + dt.microseconds * 1e-6

         line = self.fmt%(self.label[:self.label_width], pct, bar, dt)

         self.fullwidth = len(line)

         sys.stdout.write(line)

         sys.stdout.flush()

     # Clear the current bar and leave the cursor at the start of the line.

     def clear(self):

         if (self.fullwidth):

             sys.stdout.write('\r' + ' ' * self.fullwidth + '\r')

             self.fullwidth = None

     def finish(self):

         self.update(self.limit)

         sys.stdout.write('\n')

 if __name__ == '__main__':

     pb = ProgressBar('test', 12)

     for i in range(12):

         pb.update(i)

         time.sleep(0.5)

     pb.finish()