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Modifying an attribute value in Python

Classes
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schedule Jul 1, 2022
Last updated
local_offer Python
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There are two main ways to modify an attribute's value: directly or through a method.

class Cat():
# This is constructor for python
def __init__(self, name, age):
self.name = name
self.age = age
# Teaching each cat how to meow
def meow(self):
print("I am a " + str(self.age) + " year old " + self.name)

# Creating an instance my_cat representing my cat Roxas
my_cat = Cat("Roxas", 26)

Directly

To update name attribute value of my_cat:

my_cat = Cat("Roxas", 26)
my_cat.name = "Sora"
print(my_cat.name)
Sora

Through a method

We can add a method update_age to the class definition to increment age by 1:

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

# Adding method to update age
def update_age(self):
self.age = self.age + 1

# Teaching each cat how to meow
def meow(self):
print("I am a " + str(self.age) + " year old " + self.name)

To create an instance of Cat class and call update_age method:

my_cat = Cat("Roxas", 26)
my_cat.update_age()
print(my_cat.age)
27

We can see that age has now been incremented by 1.

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Published by Arthur Yanagisawa
Edited by 0 others
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