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gh-112068: C API: Add support of nullable arguments in PyArg_Parse (prefix)
- Issue: gh-112068
I assume it has to be with grouping in general, like
?(...)means that everything inside(...)is optional?
No, it means that the argument can be a sequence of particular length or None. This feature is implemented in this PR, but not in the sister's PR.
Closed in favor of #121303.