Python argparse 互斥组 [英] Python argparse mutual exclusive group
本文介绍了Python argparse 互斥组的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要的是:
pro [-a xxx |[-b yyy -c zzz]]
我试过了,但没有用.有人可以帮我吗?
group= parser.add_argument_group('模型 2')group_ex = group.add_mutually_exclusive_group()group_ex.add_argument("-a", type=str, action = "store", default = "", help="test")group_ex_2 = group_ex.add_argument_group("选项 2")group_ex_2.add_argument("-b", type=str, action = "store", default = "", help="test")group_ex_2.add_argument("-c", type=str, action = "store", default = "", help="test")
谢谢!
解决方案
add_mutually_exclusive_group
不会使整个组互斥.它使组内的选项相互排斥.
您要查找的是子命令.而不是 prog [ -a xxxx |[-b yyy -c zzz]],你会:
prog命令 1-一种: ...命令 2-b: ...-C: ...
使用第一组参数调用:
prog command_1 -a xxxx
使用第二组参数调用:
prog command_2 -b yyyy -c zzzz
您还可以将子命令参数设置为位置.
prog command_1 xxxx
有点像 git 或 svn:
git commit -amgit合并开发
工作示例
#创建顶级解析器解析器 = argparse.ArgumentParser(prog='PROG')parser.add_argument('--foo', action='store_true', help='help for foo arg.')subparsers = parser.add_subparsers(help='子命令的帮助')# 为command_1"命令创建解析器parser_a = subparsers.add_parser('command_1', help='command_1 help')parser_a.add_argument('a', type=str, help='help for bar, positional')# 为command_2"命令创建解析器parser_b = subparsers.add_parser('command_2', help='help for command_2')parser_b.add_argument('-b', type=str, help='help for b')parser_b.add_argument('-c', type=str, action='store', default='', help='test')
测试一下
<预><代码>>>>parser.print_help()用法:PROG [-h] [--foo] {command_1,command_2} ...位置参数:{command_1,command_2}子命令帮助command_1 command_1 帮助command_2 的 command_2 帮助可选参数:-h, --help 显示此帮助信息并退出--foo 帮助 foo arg.>>>>>>parser.parse_args(['command_1', '工作'])命名空间(a='working', foo=False)>>>parser.parse_args(['command_1', 'wellness', '-b x'])用法:PROG [-h] [--foo] {command_1,command_2} ...PROG:错误:无法识别的参数:-b x祝你好运.
What I need is:
pro [-a xxx | [-b yyy -c zzz]]
I tried this but does not work. Could someone help me out?
group= parser.add_argument_group('Model 2')
group_ex = group.add_mutually_exclusive_group()
group_ex.add_argument("-a", type=str, action = "store", default = "", help="test")
group_ex_2 = group_ex.add_argument_group("option 2")
group_ex_2.add_argument("-b", type=str, action = "store", default = "", help="test")
group_ex_2.add_argument("-c", type=str, action = "store", default = "", help="test")
Thanks!
解决方案
add_mutually_exclusive_group
doesn't make an entire group mutually exclusive. It makes options within the group mutually exclusive.
What you're looking for is subcommands. Instead of prog [ -a xxxx | [-b yyy -c zzz]], you'd have:
prog
command 1
-a: ...
command 2
-b: ...
-c: ...
To invoke with the first set of arguments:
prog command_1 -a xxxx
To invoke with the second set of arguments:
prog command_2 -b yyyy -c zzzz
You can also set the sub command arguments as positional.
prog command_1 xxxx
Kind of like git or svn:
git commit -am
git merge develop
Working Example
# create the top-level parser
parser = argparse.ArgumentParser(prog='PROG')
parser.add_argument('--foo', action='store_true', help='help for foo arg.')
subparsers = parser.add_subparsers(help='help for subcommand')
# create the parser for the "command_1" command
parser_a = subparsers.add_parser('command_1', help='command_1 help')
parser_a.add_argument('a', type=str, help='help for bar, positional')
# create the parser for the "command_2" command
parser_b = subparsers.add_parser('command_2', help='help for command_2')
parser_b.add_argument('-b', type=str, help='help for b')
parser_b.add_argument('-c', type=str, action='store', default='', help='test')
Test it
>>> parser.print_help()
usage: PROG [-h] [--foo] {command_1,command_2} ...
positional arguments:
{command_1,command_2}
help for subcommand
command_1 command_1 help
command_2 help for command_2
optional arguments:
-h, --help show this help message and exit
--foo help for foo arg.
>>>
>>> parser.parse_args(['command_1', 'working'])
Namespace(a='working', foo=False)
>>> parser.parse_args(['command_1', 'wellness', '-b x'])
usage: PROG [-h] [--foo] {command_1,command_2} ...
PROG: error: unrecognized arguments: -b x
Good luck.
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