面向对象之类和构造方法

class  Role(object):
                          #定义一个类，class是定义类的语法，Role是类名，（object)是新式类的写法

    def _init_(self,name,role,weapon ,life_value):#初始化函数，
        self.name=name
        self.role=role
        self.weapon=weapon
        self.life_value=life_value


    def shot(self):
           print("shooting....")


    def got_shot(self):
           print("i got shot....")

    def buy_gun(self,gun_name):
            print("%s just bought [%s] "%(self .name,gun_name))
            self.weapon=gun_name
r1=Role("Alex",'police',"AK47",90)
r1.buy_gun("AK47")
r2=Role("jack",'terrorist',"B22",100)
r2.buy_gun("B51")
print("r1:",r1.buy_gun())
print("r2:",r2.buy_gun())