argparse帮助参数列表的控件格式? [英] Control formatting of the argparse help argument list?

问题描述

import argparse
parser = argparse.ArgumentParser(prog='tool')
args = [('-u', '--upf', 'ref. upf', dict(required='True')),
        ('-s', '--skew', 'ref. skew', {}),
        ('-m', '--model', 'ref. model', {})]
for args1, args2, desc, options in args:  
     parser.add_argument(args1, args2, help=desc, **options)

parser.print_help()

输出:

usage: capcheck [-h] -u UPF [-s SKEW] [-m MODEL]

optional arguments:
  -h, --help            show this help message and exit
  -u UPF, --upf UPF     ref. upf
  -s SKEW, --skew SKEW  ref. skew
  -m MODEL, --model MODEL
                        ref. model

如何打印参考.模型与-m MODEL, --model MODEL在同一行，而不是在使用-h选项运行脚本时出现在单独的行?

How do I print ref. model in the same line as -m MODEL, --model MODEL instead of that appearing on a separate line when I run the script with -h option?

推荐答案

您可以提供formatter_class参数:

parser = argparse.ArgumentParser(prog='tool',
  formatter_class=lambda prog: argparse.HelpFormatter(prog,max_help_position=27))

args = [('-u', '--upf', 'ref. upf', dict(required='True')),
        ('-s', '--skew', 'ref. skew', {}),
        ('-m', '--model', 'ref. model', {})]
for args1, args2, desc, options in args:  
     parser.add_argument(args1, args2, help=desc, **options)

parser.print_help()

注意:argparse.HelpFormatter的实现是私有的，只有名称是public.因此，该代码可能在argparse的未来版本中停止工作.在 http://bugs.python.org/

Note: Implementation of argparse.HelpFormatter is private only the name is public. Therefore the code might stop working in future versions of argparse. File a feature request to provide a public interface for the customization of max_help_position on http://bugs.python.org/

usage: tool [-h] -u UPF [-s SKEW] [-m MODEL]

optional arguments:
  -h, --help               show this help message and exit
  -u UPF, --upf UPF        ref. upf
  -s SKEW, --skew SKEW     ref. skew
  -m MODEL, --model MODEL  ref. model

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