[Python-Dev] Type annotations and metaclasses (original) (raw)
Thomas Hauk THauk at copperleaf.com
Fri Mar 3 16:56:28 EST 2017
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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: ... app_label = "myapp" ... type(MyModel.name) <class 'django.db.models.query_utils.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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