There is no final decision yet. I didn't have time to think carefully about it.
Another thing is that with PEP 585 accepted and implemented, some aspects of PEP 604 become much simpler.

I will try to post a review here in next few weeks.


On Tue, 19 May 2020 at 22:25, Luciano Ramalho <> wrote:
"PEP 604 -- Complementary syntax for Union[]" targets Python 3.9, but
did not make into beta1 and is still draft.

Is there a final decision on that PEP?



Luciano Ramalho
|  Author of Fluent Python (O'Reilly, 2015)
|  Technical Principal at ThoughtWorks
|  Twitter: @ramalhoorg
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