python中__dict__的实例属性存储

>>> e = Employee('IT', 'bobo')

>>> e.__dict__

{'department': 'IT', 'name': 'bobo'}

>>> type(e.__dict__)

dict

>>> e.name is e.__dict__['name']

True

>>> e.__dict__['department'] = 'HR'

>>> e.department

'HR'

>>> e.age = 30 # 并没有定义 age 属性

>>> e.age

30

>>> e.__dict__

{'department': 'IT', 'name': 'bobo', 'age': 30}

>>> del e.age

>>> e.__dict__

{'department': 'IT', 'name': 'd'}