isinstance(object, classinfo)

The isinstance() function checks if an object (first argument) is an instance or subclass of classinfo (second argument).

Parameters¶

The isinstance() function takes two parameters:

• object - object to check
• classinfo - class, type, or tuple of classes and types

Return Value¶

The isinstance() function returns:

• True if the object is an instance or subclass of the class or any element in the tuple
• False otherwise

If classinfo is not a type or a tuple of types, a TypeError is raised.

Examples¶

class Foo:
    a = 5

foo_instance = Foo()

print(isinstance(foo_instance, Foo))
print(isinstance(foo_instance, (list, tuple)))
print(isinstance(foo_instance, (list, tuple, Foo)))

# Output: 
# True
# False
# True