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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 percent_cb(name, complete, total):
 """ Callback for updating target progress """

    logger.debug(
        "{}: {} transferred out of {}".format(
            name, sizeof_fmt(complete), sizeof_fmt(total)
        )
    )
    progress.update_target(name, complete, total)