python 类 __call__

 

__call__ 对象后面加括号，触发执行。

即：对象() 或者 类()()

 

class dog(object):


    def __init__(self,name):
        self.name = name

    def eat(self):
        print("%s is eating %s" % (self.name,'ss'))

    def talk(self):
        print("%s is taking" % self.name)

    def __call__(self, *args, **kwargs):
        print("you are ok？", args, kwargs)



d = dog("jianlin")
d()
d(1,2,3,name="mike")

'''
you are ok？ () {}
you are ok？ (1, 2, 3) {'name': 'mike'}
'''

另外一种实现

class dog(object):


    def __init__(self,name):
        self.name = name

    def eat(self):
        print("%s is eating %s" % (self.name,'ss'))

    def talk(self):
        print("%s is taking" % self.name)

    def __call__(self, *args, **kwargs):
        print("you are ok？", args, kwargs)



dog("jianlin")()

# you are ok？ () {}