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Python | isinstance method

Programming
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Python
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Built-in Functions
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Documentation
schedule Jul 1, 2022
Last updated
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Python's isinstance(~) method returns a boolean indicating if an object is an instance of a class or its subclasses.

Parameters

1. object | object

The object to be checked.

2. classinfo | class or type

The class or type we are checking the object for. This can also be specified as a tuple of classes and types.

Return value

A boolean indicating if the object is an instance of the specified class or its subclasses.

Examples

Basic usage

To check whether x is an instance of a list:

x = ['a', 'b', 'c']
isinstance(x, list)
True

To check whether y is an instance of a string:

y = ['a', 'b', 'c']
isinstance(y, str)
False

To check if my_dog is an instance of the Doge custom class:

class Doge():
    # This is constructor for python
    def __init__(self, name, age):
        self.name = name
        self.age = age

my_dog = Doge("Roxas", 26)

isinstance(my_dog, Doge)
True
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Published by Isshin Inada
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