I'm using a mutually exclusive group, but I more than one option to be in one of the exclusive sets. I want my usage to look like this:

[--conf CONF | --hostname HOSTNAME --port PORT]

Any idea how to accompish this? I've tried adding an argument group to a mutually exclusive group, but the mutual exclusion part doesn't apply to subgroups, and it allows --conf file --hostname host --port 22

python argparse
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