mixin that allows instances to access other instances attributes directly

attributes.py

class OtherInstancesMixin():
    def __getattribute__(self, name):
        try:
            return object.__getattribute__(self, name)
        except AttributeError as e:
            for instance in object.__getattribute__(self, "_related"):
                try:
                    return object.__getattribute__(instance, name)
                except AttributeError:
                    pass
            raise e

# USAGE
class OtherA(): # just a test class
    def __init__(self, attr):
        self.attr_a = attr

class OtherB():# test class 2
    def __init__(self, attr):
        self.attr_b = attr

class MyClass(OtherInstancesMixin):
    def __init__(self, other_a, other_b):
        self._related = [other_a, other_b] # needs to be named _related
        print(self.attr_b) # instead of self.other_a.attr

test = MyClass(OtherA("hey"), OtherB("Hello World"))