The syntax of isinstance() is:
isinstance(object, classinfo)
The isinstance() takes two parameters:
object
to be checkedThe isinstance() returns:
True
if the object is an instance or subclass of a class, or any element of the tupleFalse
otherwiseIf classinfo is not a type or tuple of types, a TypeError
exception is raised.
class Foo: a = 5 fooInstance = Foo() print(isinstance(fooInstance, Foo)) print(isinstance(fooInstance, (list, tuple))) print(isinstance(fooInstance, (list, tuple, Foo)))
When you run the program, the output will be:
True False True
numbers = [1, 2, 3] result = isinstance(numbers, list) print(numbers,'instance of list?', result) result = isinstance(numbers, dict) print(numbers,'instance of dict?', result) result = isinstance(numbers, (dict, list)) print(numbers,'instance of dict or list?', result) number = 5 result = isinstance(number, list) print(number,'instance of list?', result) result = isinstance(number, int) print(number,'instance of int?', result)
When you run the program, the output will be:
[1, 2, 3] instance of list? True [1, 2, 3] instance of dict? False [1, 2, 3] instance of dict or list? True 5 instance of list? False 5 instance of int? True
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