[Solved] Determine if a variable is an instance of any class

Question

I think your understanding of what an instance is wrong here, since everything is an object in python, so 5 is an object of class int and [2,3] is an object of class list and so on.

isinstance(x, y) is the way to go if you just want to check if x is an object of y, but if you want to check if x is an object of builtin class or your own custom defined class then you should be checking the existence of __dict__ using hasattr(x, '__dict__').

Accepted Answer

I think your understanding of what an instance is wrong here, since everything is an object in python, so 5 is an object of class int and [2,3] is an object of class list and so on.

isinstance(x, y) is the way to go if you just want to check if x is an object of y, but if you want to check if x is an object of builtin class or your own custom defined class then you should be checking the existence of __dict__ using hasattr(x, '__dict__').