Joseph Perez <jope...@hotmail.fr> added the comment:
Indeed, sorry, my example was bad. My library was raising at several place, and I've extrapolated about generic substitution. I've indeed other substitutions (without `TypeVar`), and because they were failing, I've assumed that all of my substitutions were failing; I was wrong about generic one. For example, if I want to substitute `int | Collection[int]` to `int | list[int]`, I will have to replace `types.UnionType` by `typing.Union` or use `reduce`, while it was not necessary in 3.9 where I could just write `get_origin(tp)[new_args]`. So I'll have to add some `if` in my code. ---------- stage: -> resolved status: pending -> closed _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45418> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
