How do I use properties and setters in Python?

In Python, properties and setters are used to manage the attributes of a class. A property allows you to define methods in a class that can be accessed like attributes. This encapsulation provides a way to add validation and to control access to an attribute's value.

Here's how you can create properties and setters using the built-in `property()` function or the `@property` decorator. Below is an example:


class Person:
    def __init__(self, name):
        self._name = name
    
    @property
    def name(self):
        return self._name
    
    @name.setter
    def name(self, value):
        if not isinstance(value, str):
            raise ValueError("Name must be a string.")
        self._name = value

# Usage
p = Person("Alice")
print(p.name)  # Output: Alice

p.name = "Bob"  # Sets the name to Bob
print(p.name)  # Output: Bob

# p.name = 123  # This will raise ValueError

How do I use properties and setters in Python?

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How do I use properties and setters in Python?

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