[issue34498] Python 3.7 breaks on singledispatch_function.register(pseudo_type), which Python 3.6 accepted

[Michael Selik]

Michael Selik <mike at selik.org> added the comment:

+1 for this use case. Until it's resolved, perhaps there should be a note in the singledispatch docs that types from the ``typing`` module should not be used?

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nosy: +selik

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue34498>
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