How should a python type hint require that a value has a given attribute?

Question

Let\'s say I have a simple function like this:

def foo(a: Any):
    return a.bar + a.baz

I would lik

Answer 1

Type hints can only refer to a class, so create an abstract class

import abc

class MyType(abc.ABC):

    @abc.abstractproperty
    def foo(self):
        pass

    @abc.abstractproperty
    def bar(self):
        pass

And declare f(a: MyType)