[Python-Dev] Type annotations and metaclasses (original) (raw)
Ivan Levkivskyi levkivskyi at gmail.com
Fri Mar 3 17:29:21 EST 2017
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Hi Thomas,
I think this question is more appropriate for mypy or typing trackers: https://github.com/python/mypy/issues https://github.com/python/typing/issues
-- Ivan
On 3 March 2017 at 22:56, Thomas Hauk <THauk at copperleaf.com> wrote:
I’ve read through PEPs 483, 484, and 526, but I don’t see any discussion of how type hints should work when the type of a class member differs from the type of an instance member, like when metaclasses are used to create instances.
e.g.: >>> from django.db import models >>> class MyModel(models.Model): ... name = models.CharField() ... class Meta: ... applabel = "myapp" ... >>> type(MyModel.name) <class 'django.db.models.queryutils.DeferredAttribute'> >>> m = MyModel() >>> type(m.name) <class 'str'> In this case, I would like to be able to specify an instance type of str for MyModel.name. Can someone point me to any existing relevant discussion? Or if not, where should a new discussion start? T
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