get_attribute_hook for unknown attributes

[mkurnikov]

How do I intercept type inference of the settings.ROOT_DIR here?

from django.conf import settings
settings.ROOT_DIR

I wasn't able to get it working neither with get_attribute_hook, nor with others. settings is specified as

# in django/conf/__init__.pyi
class LazySettings(object):
    pass
settings = LazySettings()

From the implementation, it looks like hooks's only called if attribute is present on the object (is a Var)
https://github.com/python/mypy/blob/master/mypy/checkmember.py#L280

Another solution for this problem could be to augment the AST with an additional settings dynamically somewhere in the plugin, but for that I need an initialization hook.

[ilevkivskyi]

You can stuff various dummy names in the class symbol table using get_class_decorator_hook(), get_metaclass_hook() and get_base_class_hook() (plus something in stubs). But I think it probably makes sense to call the hook in more cases there (e.g. if it comes from __getattr__() etc.)

[ilevkivskyi]

Fixed by #6371