如何在Python3中使用argparse解析两组命令行参数中的一组？

我想开发一个CLI，它将两对参数中的一个放在一起：

group-resources --limit 5

或

组资源是位置资源，需要限制。其余两人的规则是一样的。 然而，我当前的代码强制要求所有四个都是必需的

我当前的代码：

import argparse

import analysis
import cleanup
import etl
import initialize_db

parser = argparse.ArgumentParser(
    description='Inventory DB for Cloud Infrastructure')
parser.add_argument(
    'group-resources', help='List top k groups as per their memory, disk, and cpu count.')
parser.add_argument(
    '--limit', help='Number of groups in descending order of their resources.', type=int, required=True)
parser.add_argument(
    'group-overlap', help='Fetch nodes that belong in both the groups')
parser.add_argument(
    '--groups', help='specify the group names separated by a comma.', type=str, required=True
)

args = parser.parse_args()

print(args)

当我运行

python3 cli.py组资源--limit 5

时，出现以下错误：

usage: cli.py [-h] --limit LIMIT --groups GROUPS group-resources group-overlap
cli.py: error: the following arguments are required: group-overlap, --groups

我希望如果我提供了组资源和限制，或者如果我提供了组重叠和组，那么我的代码应该可以工作。不允许进行其他排列。我该怎么做呢？

我们可以使用。下面是我们如何对代码稍加修改

import argparse

parser = argparse.ArgumentParser(
    description='Inventory DB for Cloud Infrastructure')

subparsers = parser.add_subparsers(help='types of arguments')

group_resources_parser = subparsers.add_parser("group-resources", help='List top k groups as per their memory, disk, and cpu count.')
group_overlap_parser = subparsers.add_parser("group-overlap", help='Fetch nodes that belong in both the groups')
group_resources_parser.add_argument(
    '--limit', help='Number of groups in descending order of their resources.', type=int, required=True)
group_overlap_parser.add_argument(
    '--groups', help='specify the group names separated by a comma.', type=str, required=True
)

args = parser.parse_args()

print(args)

示例：

python3 cli.py组资源

  usage: cli.py group-resources [-h] --limit LIMIT
  cli.py group-resources: error: the following arguments are required: --limit

python3 cli.py组重叠

 usage: cli.py group-overlap [-h] --groups GROUPS
 cli.py group-overlap: error: the following arguments are required: --groups

  usage: cli.py [-h] {group-resources,group-overlap} ...
  cli.py: error: unrecognized arguments: group-overlap

python3 cli.py组资源--限制5个组重叠

 usage: cli.py group-overlap [-h] --groups GROUPS
 cli.py group-overlap: error: the following arguments are required: --groups

  usage: cli.py [-h] {group-resources,group-overlap} ...
  cli.py: error: unrecognized arguments: group-overlap