python3错误:format() takes at most 2 arguments

报：format() takes at most 2 arguments
在网上找，看到有人解释，按这位博主方法更改，果然有效
之前是按python2创建类，Person（object）如上类名Person括号后加了object,python3中将object去掉即可

class Person():
    def __init__(self,name,age,gender):
        self.name=name
        self.age=age
        self.gender=gender

    def kanchai(self):
        print("{0},{1},{2},喜欢上山去砍柴".format(self.name,self.age,self.gender))


Per=Person(u'小明','10岁','男')
Per.kanchai()