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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 register_options(this_class, argparser):
 """This class method is called so that ConfigFromFile can tell the command-line parser to register the options specific to the class. :param this_class: Not used (required by @classmethod interface) :param argparser: The argparser instance being prepared for use. """

        default_path = this_class.rc_file_basename
        default_basename = os.path.basename(default_path)
        argparser.add_argument('-c', "--config-file",
                               default=default_path,
                               help=("Configuration file to use for lookups " +
                                     "(replaces DEFAULT=%s " % (default_path) +
                                     "but not ~/%s)" % (default_basename)))