相关疑难解决方法(0)

我argparse在Python 2.7中用于解析输入选项.我的一个选择是多选.我想在其帮助文本中列出一个列表,例如

from argparse import ArgumentParser

parser = ArgumentParser(description='test')

parser.add_argument('-g', choices=['a', 'b', 'g', 'd', 'e'], default='a',
    help="Some option, where\n"
         " a = alpha\n"
         " b = beta\n"
         " g = gamma\n"
         " d = delta\n"
         " e = epsilon")

parser.parse_args()

但是,argparse删除所有换行符和连续空格.结果看起来像

~/Downloads:52$ python2.7 x.py -h
usage: x.py [-h] [-g {a,b,g,d,e}]

test

optional arguments:
  -h, --help      show this help message and exit
  -g {a,b,g,d,e}  Some option, where a = alpha b = beta g = gamma …

假设我有以下argparse片段:

diags.cmdln_parser.add_argument( '--scan-time',
                     action  = 'store',
                     nargs   = '?',
                     type    = int,
                     default = 5,
                     help    = "Wait SCAN-TIME seconds between status checks.")

目前,--help退货:

usage: connection_check.py [-h]
                             [--version] [--scan-time [SCAN_TIME]]

          Test the reliability/uptime of a connection.



optional arguments:
-h, --help            show this help message and exit
--version             show program's version number and exit
--scan-time [SCAN_TIME]
                    Wait SCAN-TIME seconds between status checks.

我更喜欢这样的东西:

--scan-time [SCAN_TIME]
                    Wait SCAN-TIME seconds between status checks.
                    (Default = 5)

偷看帮助格式化程序代码显示有限的选项.是否有一种聪明的方式来argparse以--scan-time类似的方式打印默认值,或者我应该只是 …