Making useful of REE. ^_*

REE.examples.py

#!/usr/bin/python
# -*- coding: utf-8 -*-
# Copyright (c) 2012 Yu-Jie Lin
# Copyright (c) 2005 Nilton Volpato
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA


import time

from progressbar import Bar, FormatLabel, ProgressBar, RotatingMarker


def REE_example():

    def format_updatable(updatable, pbar):
        if hasattr(updatable, 'update'): return updatable.update(pbar)
        else: return updatable

    class MyBouncingBar(Bar):
        def update(self, pbar, width):
            'Updates the progress bar and its subcomponents'

            left, marker, right = (format_updatable(i, pbar) for i in
                                   (self.left, self.marker, self.right))

            width -= len(left) + len(right)

            if pbar.finished: return '%s%s%s' % (left, width * '|', right)
            
            width -= len(marker) - 1

            position = int(pbar.currval % (width * 2 - 1))
            if position > width: position = width * 2 - position
            lpad = self.fill * (position - 1)
            rpad = self.fill * (width - len(marker) - len(lpad) + (len(marker) - 1))

            # Swap if we want to bounce the other way
            if not self.fill_left: rpad, lpad = lpad, rpad

            return '%s%s%s%s%s' % (left, lpad, marker, rpad, right)

    widgets = [FormatLabel('Animated REE Bouncer: value %(value)d - '),
               MyBouncingBar(marker=RotatingMarker(markers=('>_>', 'v_v', '<_<', '^_^')))]

    pbar = ProgressBar(widgets=widgets)
    for i in pbar((i for i in range(180))):
        time.sleep(0.05)


if __name__ == '__main__':
    REE_example()

python-progressbar: http://code.google.com/p/python-progressbar/
REE: https://github.com/livibetter/REE
Screencast: http://youtu.be/goeZaYERNnM