Simple example of what Python's Graphene library does

example.py

"""
This is an example of how Python's Graphene library behaves.  This can result in `self` not being what you expect, particularly
when using graphene-django and `self` on your graphene resolver object is the underlying django model
"""
class A:
    def foo(self):
        print("This is the foo() method on an object of class", type(self))

class B:
    pass

class C:
    def do_things(self):
        print("C() objects do not have a foo() method but I am about to call self.foo()")
        self.foo()


type_a = A()
type_b = B()

A.foo(type_b)
C.do_things(type_a)


"""
Usage/output
>>> type_a = A()
>>> type_b = B()
>>>
>>> A.foo(type_b)
This is the foo() method on an object of class <class '__main__.B'>
>>> C.do_things(type_a)
C() objects do not have a foo() method but I am about to call self.foo()
This is the foo() method on an object of class <class '__main__.A'>
>>> A.foo(type_a)
This is the foo() method on an object of class <class '__main__.A'>
"""