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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def download(url, dest):
 """ Platform-agnostic downloader. """

    u = urllib.FancyURLopener()
    logger.info("Downloading %s..." % url)
    u.retrieve(url, dest)
    logger.info('Done, see %s' % dest)
    return dest