[Python-Dev] Is static typing still optional? (original) (raw)
Ethan Furman ethan at stoneleaf.us
Mon Jan 29 03:42:20 EST 2018
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On 01/28/2018 07:45 AM, Eric V. Smith wrote:
On 1/6/2018 5:13 PM, Eric V. Smith wrote:
On 12/10/2017 5:00 PM, Raymond Hettinger wrote:
2) Change the default value for "hash" from "None" to "False". This might take a little effort because there is currently an oddity where setting hash=False causes it to be hashable. I'm pretty sure this wasn't intended ;-)
I haven't looked at this yet. I think the hashing logic explained in https://bugs.python.org/issue32513#msg310830 is correct. It uses hash=None as the default, so that frozen=True objects are hashable
In a class, __hash__ = None means the instances are not hashable... but in a dataclass decorator, hash=None means
they are?
--
Ethan
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