Python – setattr()
Python setattr() built-in function sets the value for an attribute of an object.
In this tutorial, we will learn the syntax and usage of setattr() built-in function with examples.
Syntax
The syntax of setattr() function is
setattr(object, attribute, value)where
| Parameter | Mandatory/ Optional |
Description |
|---|---|---|
| object | Mandatory | A Python object that allows setting of given attribute. |
| attribute | Mandatory | attribute is a string value. |
| value | Mandatory | Any arbitrary value. |
Please note that the object must allow the assignment of the value to the attribute.
Examples
1. Set attribute for a class object
In the following program, we define a class named Student. This class has three attributes: name, age, and country.
We create an object of class type Student, and print the details. Then we set attributes of this class object using setattr() built-in function and then print the details again.
Python Program
class Student:
name = 'Name'
age = 0
country = 'NA'
def __str__(self):
return self.name + " aged " + str(self.age) + " from " + self.country
student1 = Student()
print(student1)
setattr(student1, 'name', 'Mike')
setattr(student1, 'age', 12)
setattr(student1, 'country', 'Canada')
print(student1)Output
Name aged 0 from NA
Mike aged 12 from CanadaRelated Tutorials
- 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.
- Python delattr() This built-in function deletes the attribute from an object.
Summary
In this Built-in Functions tutorial, we learned the syntax of the setattr() built-in function, and how to use this function to set the attribute of an object with a value.