Message 314446 - Python tracker

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Author	eric.smith
Recipients	Ricyteach, eric.smith
Date	2018-03-26.10:28:57
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1522060137.7.0.467229070634.issue33141@psf.upfronthosting.co.za>
In-reply-to

Content
That's a tough one. Because C.d is not set to a descriptor at type creation time (it's set to a Field object), the __set_name__ behavior is never invoked. It's when the @dataclass decorator is called that C.d is set to D(). https://docs.python.org/3/reference/datamodel.html#creating-the-class-object I'm not sure it's possible to work around this without duplicating some of the type creation code, and even then I'm not convinced it's doable.

That's a tough one. Because C.d is not set to a descriptor at type creation time (it's set to a Field object), the __set_name__ behavior is never invoked. It's when the @dataclass decorator is called that C.d is set to D().

https://docs.python.org/3/reference/datamodel.html#creating-the-class-object

I'm not sure it's possible to work around this without duplicating some of the type creation code, and even then I'm not convinced it's doable.

History
Date	User	Action	Args
2018-03-26 10:28:57	eric.smith	set	recipients: + eric.smith, Ricyteach
2018-03-26 10:28:57	eric.smith	set	messageid: <1522060137.7.0.467229070634.issue33141@psf.upfronthosting.co.za>
2018-03-26 10:28:57	eric.smith	link	issue33141 messages
2018-03-26 10:28:57	eric.smith	create