Python 3 Deep Dive Part 4 Oop -

@celsius.setter def celsius(self, value): if value < -273.15: raise ValueError("Below absolute zero") self._celsius = value class PositiveNumber: def __set_name__(self, owner, name): self.name = name def __get__(self, instance, owner): return instance.__dict__.get(self.name)

def drive(self): self.engine.start() for w in self.wheels: w.rotate() A mixin is a small class that provides specific behavior but is not meant to stand alone. python 3 deep dive part 4 oop

class MultiLogger(Timestamp, Uppercase): pass @celsius

class Engine: def start(self): pass class Wheels: def rotate(self): pass @celsius.setter def celsius(self

class LogPlugin(Plugin): def run(self): print("Logging...")