Gnome wallpaper slideshow creator

slideshow_creator.py

#!/usr/bin/env python

import os
import sys
import logging
from datetime import date
from optparse import OptionParser

IMAGE_TYPES = [
    'png',
    'jpg',
    'jpeg',
    'gif',
]

logging.basicConfig(level=logging.DEBUG,
    format='%(levelname)-6s %(message)s',
    datefmt='%m-%d %H:%M')

def create_config(path=None, duration=600, transition=5.0):
    if not path:
        logging.error('You must specify a path')
        return None
    d = date.today()
    cfg = '<background>\n'
    cfg += '\t<starttime>\n'
    cfg += '\t\t<year>{0}</year>\n'.format(d.year)
    cfg += '\t\t<month>{0}</month>\n'.format(d.month)
    cfg += '\t\t<day>{0}</day>\n'.format(d.day)
    cfg += '\t\t<hour>00</hour>\n'
    cfg += '\t\t<minute>00</minute>\n'
    cfg += '\t\t<second>00</second>\n'
    cfg += '\t</starttime>\n'
    prev_file = None
    for f in os.listdir(path):
        fpath = os.path.join(path, f)
        fname, ext = os.path.splitext(f)
        # check image type
        if ext.lower().replace('.', '') in IMAGE_TYPES:
            if prev_file:
                cfg += '\t<transition>\n'
                cfg += '\t\t<duration>{0}</duration>\n'.format(transition)
                cfg += '\t\t<from>{0}</from>\n'.format(prev_file)
                cfg += '\t\t<to>{0}</to>\n'.format(fpath)
                cfg += '\t</transition>\n'
            cfg += '\t<static>\n'
            cfg += '\t\t<duration>{0}</duration>\n'.format(duration)
            cfg += '\t\t<file>{0}</file>\n'.format(fpath)
            cfg += '\t</static>\n'
            prev_file = fpath
    cfg += '</background>\n'
    return cfg

if __name__ == '__main__':
    op = OptionParser()
    op.add_option('-p', '--path', dest='path', help='Path to images')
    op.add_option('-d', '--duration', dest='duration', default='600', help='Duration of images')
    op.add_option('-t', '--transition', dest='transition', default='5', help='Duration of transition')

    opts, args = op.parse_args()
    if not opts.path:
        op.print_help()
        sys.exit(1)
    cfg = create_config(opts.path, opts.duration, opts.transition)
    cfg_file = os.path.join(opts.path, 'background-1.xml')
    f = open(cfg_file, 'w')
    f.write(cfg)
    f.close()
    logging.info('Configuration file created: {0}'.format(cfg_file))
    logging.info('Done.')