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# Modifying an attribute value in Python

schedule Aug 12, 2023
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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 Roxasmy_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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