Lesson 21 — Properties

Computed attributes

@property makes a method act like a read-only attribute: you write c.area, not c.area(). The value is calculated every time you read it, so it always matches the other fields. Put @property on the line right above the def.

class User:
    def __init__(self, first, last):
        self.first, self.last = first, last
    @property
    def full(self):
        return self.first + " " + self.last

Why it matters: it hides logic behind a clean attribute-style API.