Comment by bavaza on Wrong result when comparing ref and WeakMethod in Python?

Thanks @chepner. To me it seems a quirk in WeakMethod: even though id(x) != id(y), both x == y and WeakMethod(x) == WeakMethod(y) are true, which makes sense. However, altough cb != cb.methodm we still get ref(cb) == WeakMethod(cb.method). Since sets use __eq__ to compare objects, my 2nd call does not add the callable to the set. Obviously, I'll change my code to account for this.