def help(argv):
    '\n    help\n        输出本段消息\n    '
    print(('usage: %s command [command args]' % argv0))
    helpcmds(global_cmds)
help
    输出本段消息
def help(argv):
    '\n    help\n        输出本段消息\n    '
    print(('usage: %s command [command args]' % argv0))
    helpcmds(global_cmds)