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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 launch(self, args=None):
 """ This method triggers the parsing of arguments. """

        self.options = self.parse_args(args)
        if self.options.saveinputmeta:
            # save original input options
            self.save_input_meta()
        if self.options.inputmeta:
            # read new options from JSON file
            self.options = self.get_options_from_file(self.options.inputmeta)
        self.run(self.options)
        # if required save meta data for the output after running the plugin app
        if self.options.saveoutputmeta:
            self.save_output_meta()