稀疏输出未对齐

问题描述

我正在使用argparse作为参数，我有许多argparse语句.我希望在输出中不应该打印大写字母DELETE或将它们对齐.在我的另一个argparse案例中，大写单词未在单个列中对齐.

I am using argparse for arguments, I have numbers of argparse statements. I want in the output the capital DELETE should not be print or they should be aligned.In my case for another argparse the capital words are not aligned in a single column.

   parser = argparse.ArgumentParser()
   parser.add_argument( '-del'    ,action='store'          ,dest='delete'       , help="Del a POX"
   parser.add_argument( '-a'    ,action='store'          ,dest='add'       , help="add a POX"
   return parser

   python myscript.h -h
   -del DELETE Del a POX
   -a     Add  add a POX

推荐答案

使用您的参数，我得到:

With your parameters I get:

In [417]: parser=argparse.ArgumentParser()
In [418]: a1=parser.add_argument('-del',dest='delete', help='help')
In [419]: a2=parser.add_argument('-a',dest='add', help='help')
In [420]: parser.print_help()
usage: ipython3 [-h] [-del DELETE] [-a ADD]

optional arguments:
  -h, --help   show this help message and exit
  -del DELETE  help
  -a ADD       help

DELETE和ADD是metavar，是将跟随该标志的参数的代表.在常规帮助显示中，它们紧随标志-a ADD之后.我不知道是什么在'-a Add'中产生了额外的空间.

The DELETE and ADD are metavars, standins for the argument that will follow the flag. In the normal help display they follow immediately after the flag, -a ADD. I don't know what is producing the extra space in '-a Add '.

我本可以通过以下方式设置您的论点

I would have set up your arguments with:

In [421]: parser=argparse.ArgumentParser()
In [422]: a1=parser.add_argument('-d','--delete', help='help')
In [423]: a2=parser.add_argument('-a','--add', help='help')
In [424]: parser.print_help()
usage: ipython3 [-h] [-d DELETE] [-a ADD]

optional arguments:
  -h, --help            show this help message and exit
  -d DELETE, --delete DELETE
                        help
  -a ADD, --add ADD     help

并使用metavar参数，此处为空字符串:

And with the metavar parameter, here an empty string:

In [425]: parser=argparse.ArgumentParser()
In [426]: a1=parser.add_argument('-d','--delete', metavar='', help='help')
In [427]: a2=parser.add_argument('-a','--add', metavar='', help='help')
In [428]: parser.print_help()
usage: ipython3 [-h] [-d] [-a]

optional arguments:
  -h, --help      show this help message and exit
  -d , --delete   help
  -a , --add      help

dest通常是从第一个--标志字符串推导出的；但是可以像您所做的那样进行显式设置. metavar是从dest派生的-通常是大写的-实际上我不知道是什么产生了Add而不是ADD.

dest is normally deduced from the first -- flag string; but can, as you do, be set explicitly. metavar is derived from the dest - usually upper cased - in fact I don't know what produces the Add instead of ADD.

它对齐该行的help部分，但不对齐Matavar部分.

It aligns the help portion of the line, but does not align the matavar part.

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