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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 init_argparser_working_dir( self, argparser, explanation='', help_template=( 'the working directory; %(explanation)s' 'default is current working directory (%(cwd)s)'), ):
 """ Subclass could an extra expanation on how this is used. Arguments explanation Explanation text for the default help template help_template A standard help message for this option. """


        cwd = self.toolchain.join_cwd()
        argparser.add_argument(
            '--working-dir', dest=WORKING_DIR,
            metavar=metavar(WORKING_DIR),
            default=cwd,
            help=help_template % {'explanation': explanation, 'cwd': cwd},
        )