Python 反射

反射
   hasattr(obj,name_str),判断一个对象里是否有对应的字符串的方法
   getattr(obj,name_str)，得到对象里对应字符串的方法，并执行

class Dog(object):
    def __init__(self, name):
        self.name = name

    def eat(self, food):
        print('%s is eating ... %s' % (self.name, food))
        
def bluk(self):
    print('%s is yell....' % self.name)


d = Dog('dog1')

choice = input('>>:')
if hasattr(d, choice):

    # 删除属性
    delattr(d, choice)
    print(d.name)

    # 当输入name时，将name复制为dog
    # attr = getattr(d, choice)
    # setattr(d, choice, 'dog2')
    # print(d.name)

    # 当输入eat时的代码
    # getattr(d, choice)('meat')

else:

    # 无方法，给属性直接赋值
    setattr(d, choice, 22)
    print(getattr(d, choice))

    # setattr(d,choice,None)
    # print(getattr(d,choice))

    # setattr(d, choice, bluk)
    # d.talk(d)