object - Python check instances of classes

Question

Is there any way to check if object is an instance of a class? Not an instance of a concrete class, but an instance of any class.

I can check that an object is not a class, not a module, not a traceback etc., but I am interested in a simple solution.

Answer 1

isinstance() is your friend here. It returns a boolean and can be used in the following ways to check types.

if isinstance(obj, (int, long, float, complex)):
    print obj, "is a built-in number type"

if isinstance(obj, MyClass):
    print obj, "is of type MyClass"

Hope this helps.