Perhaps @serhiy-storchaka you can take a look? I think you updated this conditional and added some additional tests for -- in #114814

This does not work for nargs='+' or nargs=3. Also, I afraid that this does not fix the issue for several positional arguments -- only the first -- should be removed.

This issue may require a fix at different level. I'll try to resolve it.

Ah, thanks for the review, @serhiy-storchaka. It was my mistake to expect tests to catch some of these. I can take another look and add additional tests here.

@serhiy-storchaka I've updated the PR. Does this cover the test cases you were thinking of?

Or do you already have another PR in progress?

This is not enough. p.parse_args(['--', '--', 'a', '--', 'b']) swallows the double dash between 'a' and 'b'. This issue can only be solved at the higher level. See #124233.

I am afraid that my reaction may not have seemed very friendly to you. In this case, I apologize and make sure that the reason for this is only my bad English and my fatigue. I didn't mean anything bad. It's just that in this case your approach was a dead end, this problem needed to be solved at another level. I've already spent half a day creating a solution, and creating a new PR was much easier than leading you to incrementally modify your PR. It happens to everyone, even major developers close their PRs. My main mistake was that I did not know words how to say this to you.

I look forward to working with you.