How to test if an object is a lock?

Question

How would you test if an object is a threading.Lock or multiprocessing.Lock (and their respective RLocks?). These objects in Python (3, at least) are factory methods, so you can't just do:

isinstance(obj, threading.Lock)

As this would give:

TypeError: isinstance() arg 2 must be a type or tuple of types

Answer 1

If you have an instance, you can get its type. So the simple solution is to do

threading_Lock = type(threading.Lock())
isinstance(obj, threading_Lock)