argparse模块如何添加不带任何参数的选项? [英] argparse module How to add option without any argument?

问题描述

我已经使用argparse创建了一个脚本.

I have created a script using argparse.

脚本需要使用配置文件名作为选项，用户可以指定是完全执行脚本还是仅对脚本进行仿真.

The script needs to take a configuration file name as an option, and user can specify whether they need to proceed totally the script or only simulate it.

要传递的参数:./script -f config_file -s或./script -f config_file.

-f config_file部分可以，但它一直在询问-s的参数，该参数是可选的，不应跟随任何参数.

It's ok for the -f config_file part, but It keeps asking me for arguments for the -s which is optionnal and should not be followed by any.

我已经尝试过了:

parser = argparse.ArgumentParser()
parser.add_argument('-f', '--file')
#parser.add_argument('-s', '--simulate', nargs = '0')
args = parser.parse_args()
if args.file:
    config_file = args.file
if args.set_in_prod:
        simulate = True
else:
    pass

出现以下错误:

File "/usr/local/lib/python2.6/dist-packages/argparse.py", line 2169, in _get_nargs_pattern
nargs_pattern = '(-*%s-*)' % '-*'.join('A' * nargs)
TypeError: can't multiply sequence by non-int of type 'str'

与''而不是0相同.

推荐答案

为 查看全文