On Fri, Nov 26, 2021 at 6:22 PM Abdulla Al Kathiri <alkathiri.abdu...@gmail.com> wrote: > > Chris, > > Will we able to use late-bound arguments in dataclass when it’s creating the > __init__ function? > > @dataclass > class C: > x: int > y: int > ls: list[int] => [x, y] >
With that syntax, no, because there's no object that can be stored in an annotation dictionary that would represent the code construct to create that effect. But the __init__ function is constructed with exec(), and that means that, in theory, dataclasses._field_init could be enhanced to have some way to indicate this - or, possibly, to *always* use late-bound defaults, since it appears to use sentinels for everything. I don't know enough about the workings of dataclasses.dataclass to be able to say for sure, but a cursory glance does suggest that, in some way, this should be possible. It may require stringifying the default though. ls: list[int] = "[x, y]" ChrisA _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/YVLHVQK27TN6M5OKZKXJGUEZX47BRHGK/ Code of Conduct: http://python.org/psf/codeofconduct/
