使用argparse subparser显示命令的子组

Question

我目前正在开发一个包含~40个子命令的Python程序。 解析器使用argparse完成。 随着子命令的数量增加，搜索感兴趣的命令变得复杂。 目前，它如下所示。

$ pgrm -h
  Usage: pgrm [-h] [-v]  ...

  Blabla bla.

Main command arguments:
 -h, --help          show this help message and exit
 -v, --version       show program's version number and exit

Available sub-commands:

  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…


Usage example:
 'pgrm sub-command -h' for more information.

我想更改显示以显示类别（例如更新/插入/选择）和相关的子命令。

$ pgrm -h
  Usage: pgrm [-h] [-v]  ...

  Blabla bla.

Main command arguments:
 -h, --help          show this help message and exit
 -v, --version       show program's version number and exit

Available sub-commands:

Updating
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
Selecting
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
Inserting
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…
  sub_cmd        Some description about the command…  

有没有可以在argparser中使用的解决方案来实现这样的CLI？

谢谢

Answer 1

几年前我曾探讨过这个问题

http://bugs.python.org/issue9341允许对argparse子命令进行分组

如果我正确地读取了我提出的补丁，它只需要更改_SubParsersAction类，而不需要对HelpFormatter或ArgumentParser类进行进一步的更改。