Am 20.09.19 um 11:19 schrieb Philippe Prados:

I just publish the PEP-0604 for discussions (https://www.python.org/dev/peps/pep-0604/).

I'm strongly in favor of a more succinct syntax for both Union and Optional. But just to add my own bike-shedding to it: I prefer using the "or" operator over the "|" operator for Union. This feels more in line with existing Python operators and the preference for speaking code. "or" is the logical OR, while "|" is used for bit-wise operations. "x: int or str" is also quite intuitive. I also echo the sentiments of using "~" for Optional. As the bit-wise inversion operator it has quite a different meaning at the moment.

 - Sebastian

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