# __getattribute__(self, name): Automatically called when the attribute name is accessed. # __getattr__(self, name): Automatically called when the attribute name is accessed and the object has no such attribute. # __setattr__(self, name, value): Automatically called when an attempt is made to bind the attribute name to value. # __delattr__(self, name): Automatically called when an attempt is made to delete the attribute name.
class Rectangle: def __init__(self): self.width = 0 self.height = 0 def __setattr__(self, name, value): if name == 'size': self.width, self.height = value else: self.__dict__[name] = value def __getattr__(self, name): if name == 'size': return self.width, self.height else: raise AttributeError
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