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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 add_root_log_file(log_file):
 """ Add a log file to the root logger. Parameters log_file :obj:`str` The path to the log file. """

    root_logger = logging.getLogger()

    # add a file handle to the root logger
    hdlr = logging.FileHandler(log_file)
    formatter = logging.Formatter('%(asctime)s %(name)-10s %(levelname)-8s %(message)s', datefmt='%m-%d %H:%M:%S')
    hdlr.setFormatter(formatter)
    root_logger.addHandler(hdlr)
    root_logger.info('Root logger now logging to {}'.format(log_file))