@command(args="<cmd>", descr="show cmd usage", req_args=['[args]'])
    def usage(self):
        if not self.args in 'arg' or self.args.arg == []:
            self.parser.print_help()
            sys.exit(-1)

        for sub_cmd in self.args.arg:
            self.usage_helper(sub_cmd)
dataset/ETHPy150Open spotify/snakebite/snakebite/commandlineparser.py/CommandLineParser.usage/swapped operands of `in`