Python isinstance() Function

Check if the number 5 is an integer:

x = isinstance(5, int)

Definition and Usage

The isinstance() function returns True if the specified object is of the specified type, otherwise False.

If the type parameter is a tuple, this function will return True if the object is one of the types in the tuple.

isinstance(object, type)

Parameter	Description
object	Required. An object.
type	A type or a class, or a tuple of types and/or classes

Check if "Hello" is one of the types described in the type parameter:

x = isinstance("Hello", (float, int, str, list, dict, tuple))

Check if y is an instance of myObj:

class myObj:
name = "John"

y = myObj()

x = isinstance(y, myObj)

The issubclass() function, to check if an object is a subclass of another object.