Python in a Nutshell

Name

isinstance

Synopsis

isinstance(obj,cls)

Returns True when obj is an instance of class cls (or any subclass of cls) or when cls is a type object and obj is an object of that type. Otherwise it returns False.

Since Python 2.2.1, cls can also be a tuple whose items are classes or types. In this case, isinstance returns True if obj is an instance of any of the items of tuple cls, otherwise isinstance returns False.