On Wed, Dec 14, 2016 at 5:11 PM, Veek M <vek.m1...@gmail.com> wrote: > I know that with user classes one can define getattr, setattr to handle > dictionary lookup. Is there a way to hook into the native dict() type > and see in real time what's being queried. > > I wanted to check if when one does: > > x.sin() > > if the x.__dict__ was queried or if the Foo.__dict__ was queried.. I > know method/attribute lookup starts with the instance but was wondering > if I could see it in action vs defining __getattr__ __setattr__ in Foo > which is a bit indirect.. and not what I want.
Normally, I would say "subclass dict and override __getitem__", but interestingly, that doesn't seem to work. You can put a subclass of dict in an object's __dict__, but Python won't call your functions - at least, CPython 3.7 won't. Presumably the actual lookups and updates are done by directly tinkering with the dict's internals, from C. ChrisA -- https://mail.python.org/mailman/listinfo/python-list
