delattr() Built-in Function

Python – delattr()

Python delattr() builtin function deletes specified attribute/property from the given object.

In this tutorial, you will learn the syntax of any() function, and then its usage with the help of example programs.

Syntax

The syntax of delattr() function is

delattr(object, attribute)

where

Examples

1. Delete attribute from object

In the following program, we define a Fruit class with three attributes: name, quantity, and description. We create an object of this Fruit type, and delete the description attribute using delattr() function.

class Fruit:
    name = ''
    quantity = ''
    description = ''
    
    def __init__(self, name, quantity, description):
        self.name = name
        self.quantity = quantity
        self.description = description

    def __str__(self):
        details = ''
        details += f'Name        : {self.name}\n'
        details += f'Quantity    : {self.quantity}\n'
        details += f'Description : {self.description}\n'
        return details

apple = Fruit('Apple', '58', 'Good for health.')

#before delete attribute
print(apple)

delattr(apple, 'description')
#after delete attribute
print(apple)

Output

Name        : Apple
Quantity    : 58
Description : Good for health.

Name        : Apple
Quantity    : 58
Description : 

2. Delete attribute (which is not present) from object

If we try to delete an attribute that is not present in the object, then the interpreter raises AttributeError.

In the following program, we delete an attribute named 'someother' which is not present for the apple object. Therefore python interpreter raises AttributeError.

class Fruit:
    name = ''
    quantity = ''
    description = ''
    
    def __init__(self, name, quantity, description):
        self.name = name
        self.quantity = quantity
        self.description = description

    def __str__(self):
        details = ''
        details += f'Name        : {self.name}\n'
        details += f'Quantity    : {self.quantity}\n'
        details += f'Description : {self.description}\n'
        return details

apple = Fruit('Apple', '58', 'Good for health.')

#before delete attribute
print(apple)

delattr(apple, 'someother')
#after delete attribute
print(apple)

Output

Name        : Apple
Quantity    : 58
Description : Good for health.

Traceback (most recent call last):
  File "/Users/arjun/Documents/workspace/python/selenium/example1.py", line 23, in <module>
    delattr(apple, 'someother')
AttributeError: someother

Related Tutorials

• Python setattr() This built-in function sets the value of an attribute of an object.
• Python getattr() This built-in function gets the value of an attribute of an object.
• Python hasattr() This built-in function checks if the object has the specified attribute.

Summary

In this tutorial of Python Examples, we learned the syntax of delattr() function, and how to delete an attribute from an object, with examples.