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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 _handle_help(self, env, args):
 """ Handles showing help information for arguments provided. `env` Runtime ``Environment`` instance. `args` List of argument strings passed. Returns ``False`` if nothing handled. * Raises ``HelpBanner`` exception if valid subcommand provided. """


        if args:
            # command help (focus help [command])
            # get command plugin registered for command
            active = env.task.active
            plugin_obj = registration.get_command_hook(args[0], active)

            if plugin_obj:
                parser = self._get_plugin_parser(plugin_obj)
                raise HelpBanner(parser.format_help(), code=0)

        return False