Python 3 Deep Dive Part 4 Oop

Once upon a time in the sprawling digital kingdom of Pythoria, there lived a visionary architect named Guido. In the early days, the citizens of Pythoria wrote instructions as long, winding scrolls of code—logical, but messy. As the kingdom grew, Guido realized they needed a better way to build.

def __set__(self, obj, value): if value <= 0: raise ValueError("Must be positive") obj.__dict__[self.name] = value def __add__(self, other): return Vector(self.x + other.x, self.y + other.y) 
class Optimized:
    __slots__ = ['x', 'y']