01-内置类属性

内置类属性：python中每个类都拥有内置的类属性
__name__
__doc__
__dict__
__module__
__bases__

class Cat():
    """说明文档  猫类"""
    number = 0
    def __init__(self,name='',color=''):
        self.name = name
        self.color = color

    def fun(self):
        print('%s在跑'%self.name)
    @staticmethod
    def shout():
        print('喵')
    @classmethod
    def get_number(cls):
        print('猫的数量：%d'%cls.number)


class Animal:
    """动物类"""



if __name__ == '__main__':
    cat1 = Cat('花','white')
    """
    1.类.__name__
    获取类的名字（字符串）
    """
    print(Cat.__name__)
    """
    2.类.__doc__
    获取类的说明文档

    """
    print(Cat.__doc__)
    print(dict.__doc__)


    """
    3.类.__dict__    :获取类中所有的类属性和对应的值，以键值对的形式存到字典里面
      对象.__dict__  :将对象的属性和对应的值，转换成字典的元素(常用，记住)
    """
    print(Cat.__dict__)
    print(cat1.__dict__)


    """
    4.类.__module__:获取当前类所在模块的名字
    """
    print (Cat.__module__)


    """
    5.类.__bases__:获取当前类的父类
    """
    print(Cat.__bases__)

运行结果如下：

Cat
说明文档  猫类
dict() -> new empty dictionary
dict(mapping) -> new dictionary initialized from a mapping object's
    (key, value) pairs
dict(iterable) -> new dictionary initialized as if via:
    d = {}
    for k, v in iterable:
        d[k] = v
dict(**kwargs) -> new dictionary initialized with the name=value pairs
    in the keyword argument list.  For example:  dict(one=1, two=2)
{'__module__': '__main__', '__doc__': '说明文档  猫类', 'number': 0, '__init__': <function Cat.__init__ at 0x00000000026C8D90>, 'fun': <function Cat.fun at 0x00000000026C8E18>, 'shout': <staticmethod object at 0x00000000026D0320>, 'get_number': <classmethod object at 0x00000000026D0390>, '__dict__': <attribute '__dict__' of 'Cat' objects>, '__weakref__': <attribute '__weakref__' of 'Cat' objects>}
{'name': '花', 'color': 'white'}
__main__
(<class 'object'>,)