Question

class Tank(object):

    def _init_(self,name):

        self.name =  name
        self.alive = True
        self.ammo = 5
        self.armor = 60

    def _str_(self):

        if self.alive:
            return "%s (%i armor and %i shells left)"%(self.name,self.armor,self.ammo)
        else:
            return "%s is DEAD !" % self.name

    def fire_at(self,enemy):

        if self.ammo >= 1:
            self.ammo-=1
            print(self.name," fires on ",enemy.name)
            enemy.hit()
        else:
            print(self.name," has no shells!")

        def hit(Self):

            self.armor-=20
            print(self.name," is hit !")
            if self.armor<=0:
                self.explode()

        def explode(self):

            self.alive = False
            print(self.name," explodes !!!!")

from tank import Tank

tanks = {"a":Tank("Alice"), "b":Tank("Bob"), "c":Tank("Crane") }
alive_tanks = len(tanks)

while alive_tanks > 1:
    print()
    for tank_name in sorted(tanks):
        print(tank_name,tanks[tank_name])

    first = raw_input("Who fires ?").lower()
    second = raw_input("Who at ?").lower()

    try:
        first_tank = tanks[first]
        second_tank = tanks[second]
    except KeyError:
        print("No such Tank ")
        continue

    if not first_tank.alive or not second_tank.alive:
        print("One of those is dead!")
        continue

    print()
    print("*"*30)

    first_tank.fire_at(second_tank)
    if not second_tank.alive:
        alive_tanks -= 1

    print("*"*30)

    for tank in tanks.value():
        if tank.alive:
            print(tank.name," is the winner !")
            break

运行时出现错误：

tanks = {"a":Tank("Alice"), "b":Tank("Bob"), "c":Tank("Crane") }
TypeError: object() takes no parameters

我需要解决什么？

Answer 1

类init方法是ddunder方法，如果没有调用默认的init方法，则需要在该方法前后声明两个下划线。

__init__(self, name)

代替

_init_(self, name)

str方法也一样，它必须是：

__str__

Python TypeError object（）在类时不接受任何参数

1 个答案: