Python 无法调用函数

Question

我正在 python 上开发石头剪刀布，但我被卡住了。 我做了一个在(石头、剪刀、布)之间循环的类(class)，我希望计算机知道它是之前的游戏。 例如(第一轮计算机玩石头，下一轮它应该玩纸)
但我不知道如何调用学习函数使其工作

class Player:
def __init__(self):
    self.score = 0

def move(self):
    return 'rock'

def learn(self, my_move, their_move):
    self.my_move = my_move
    self.their_move = their_move

def beats(one, two):
return ((one == 'rock' and two == 'scissors') or
        (one == 'scissors' and two == 'paper') or
        (one == 'paper' and two == 'rock'))

class Game:
def __init__(self, p1, p2):
    self.p1 = p1
    self.p2 = p2

def play_round(self):
    move1 = input("Pick something!\n")
    move2 = self.p2.move()
    print(f"Player 1: {move1}  Player 2: {move2}")
    self.p1.learn(move1, move2)
    self.p2.learn(move2, move1)
    if beats(move1, move2):
        self.p1.score += 1
        print ("You win")
        print ("Human score = " + str(self.p1.score) + " "  + "Computer score = " + str(self.p2.score) ) 
    elif beats(move2,move1):
        self.p2.score += 1
        print ("Computer wins")
        print ("Human score = " + str(self.p1.score) + " "  + "Computer score = " + str(self.p2.score) ) 
    else:
        print ("Draw")
        print ("Human score = " + str(self.p1.score) + " "  + "Computer score = " + str(self.p2.score) )

def play_game(self):
    print("Game start!")
    for round in range(3):
        print(f"Round {round}:")
        self.play_round()
    print("Game over!")

class human_player(Player):
def move(self):
   return input("Pick something!\n")

class randomplayer(Player):
def move(self):
    return random.choice(moves)

class repeat(Player):
def move(self):
    return 'rock'

class cycleplayer(Player):
def move(self):
    # calling my_move from the Player class
    if self.learn.my_move == "rock" or "paper" or "scissors" :
        return 'rock'

    elif  self.their_move == 'rock':
        return "paper"   

    elif self.their_move == 'paper':
        return "scissors"  

    elif self.their_move == 'scissors':
        return "rock"

if HumanPlayer_choice == "cycle" :
game = Game(Player(), cycleplayer())
game.play_game()

这是我收到的错误。

Exception has occurred: AttributeError 'function' object has no attribute 'my_move'

我知道我需要将 init 函数与 learn 函数结合使用才能使其工作，但我不确定如何操作。

Answer 1

问题出在这一行:

if self.learn.my_move == "rock" or "paper" or "scissors" :

learn 函数没有名为 my_move 的属性。你想做的可能是

if self.my_move == "rock" or self.my_move == "paper" or self.my_move == "scissors" :

请注意，您必须在“paper”和“scissors”之前添加self.my_move ==；否则它的评估如下:

if (self.my_move == "rock") or ("paper") or ("scissors"):

并且由于非空字符串始终被评估为 True，因此此 if 情况变得毫无用处。

<小时/>

正如 @DmitryErohin 提到的，有一种更好的方法可以实现这一目标，而无需重复自己:

if (self.my_move in ("rock", "paper", "scissors")):

这更加简洁并且更具可读性