Python argparse 值范围帮助消息外观 [英] Python argparse value range help message appearance

问题描述

我有一个程序参数，它是一个 1-100 的整数，我只是不喜欢它在使用 argparse 时出现在 -h 帮助消息中的方式(它实际上列出了 0、1、2、3、4、5、...等)

I have an argument for a program that is an integer from 1-100 and I just don't like the way that it shows up in the -h help message when using argparse (it literally lists 0, 1, 2, 3, 4, 5,... etc)

有什么办法可以改变这一点或以另一种方式表示吗?

Is there any way to change this or have it represented in another way?

谢谢

这是那些问的人的代码:

Here is the code for those who asked:

norse = parser.add_argument_group('Norse')
norse.add_argument('-n', '--norse', required=False, help='Run the Norse IPViking scan.', action='store_true')
norse.add_argument('--threshold', required=False, type=int, choices=range(0,101), help='Threshold (0-100) denoting at what threat level to provide additional data on an IP \
                        address. Default is 49.', default=49)

推荐答案

使用 add_argument() 的metavar 参数.

Use the metavar parameter of add_argument().

例如:

norse = parser.add_argument_group('Norse')
norse.add_argument('-n', '--norse', required=False, help='Run the Norse IPViking scan.', action='store_true')
norse.add_argument('--threshold', required=False, type=int, choices=range(0,101),
                   metavar="[0-100]", 
                   help='Threshold (0-100) denoting at what threat level to provide additional data on an IP \
                        address. Default is 49.', default=49)

测试:

from argparse import ArgumentParser

norse = ArgumentParser()

norse.add_argument('-n', '--norse', required=False, help='Run the Norse IPViking scan.', action='store_true')
norse.add_argument('--threshold', required=False, type=int, choices=range(0,101), metavar="[0-100]", help='Threshold (0-100) denoting at what threat level to provide additional data on an IP address. Default is 49.', default=49)


norse.print_help()

结果

usage: -c [-h] [-n] [--threshold [0-100]]

optional arguments:
  -h, --help           show this help message and exit
  -n, --norse          Run the Norse IPViking scan.
  --threshold [0-100]  Threshold (0-100) denoting at what threat level to
                       provide additional data on an IP address. Default is
                       49.

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