错误：缺少 2 个必需的位置参数

Question

首先我很抱歉，因为我知道这是一个基本问题，我试图从其他类似问题中寻找线索以找到答案，但到目前为止我还没有解决我的问题。

错误出现在下面的最后一段代码中，我尝试添加一个功能来重新启动程序，以便用户可以继续玩。

错误是“user_win() 缺少 2 个必需的位置参数：'player' 和 'opponent'”

--

代码是：

import random

def play():
    user = input("Enter 'rock', 'paper', or 'scissors': ").lower()
    computer = random.choice(['rock', 'paper', 'scissors'])
    return '\nThe computer randomly entered "{}".'.format(computer)

def user_win(player, opponent):
    if (player == 'rock' and opponent =='scissors') or (player == 'scissors' and opponent == 'paper') or (player == 'paper' and opponent == 'rock'):
        return 'Game result: you won!\n',
    elif player == opponent:
        return 'Game result: it\'s a tie!\n',
    elif player is not 'rock' or 'paper' or 'scissors':
        return 'Oops, enter a correct word.',
    else:
        return 'Game result: you lost!',

def script():
    print(play())
    print(user_win())
    restart = input("Would you like to try again?")
    if restart == "yes":
        print(script())
    if restart == "no":
        print("Thank you for playing.")

我尝试在 print(user_win(player, opponent)) 中输入 def script()，然后我收到了“玩家”和“对手”未定义的错误。所以我尝试在 def script() 上方定义这些变量，但我不知道如何定义。

Answer 1

您可以直接从 user_win(user, computer) 调用 play()，因为 play 是定义每个玩家移动的地方。

Answer 2

只需从 play() 返回用户和计算机输入并传递给 user_win(player, opponent) 也更新了 elif player not in ['rock','paper','scissors']:

代码：

import random

def play():
    user = input("Enter 'rock', 'paper', or 'scissors': ").lower()
    computer = random.choice(['rock', 'paper', 'scissors'])
    print('\nThe computer randomly entered "{}".'.format(computer))
    return user, computer
def user_win(player, opponent):
    if (player == 'rock' and opponent =='scissors') or (player == 'scissors' and opponent == 'paper') or (player == 'paper' and opponent == 'rock'):
        return 'Game result: you won!\n'
    elif player == opponent:
        return 'Game result: it\'s a tie!\n'
    
    elif player not in ['rock','paper','scissors']:
        return 'Oops, enter a correct word.'
    else:
        return 'Game result: you lost!'

def script():
    player, opponent = play()

    print(user_win(player,opponent))
    restart = input("Would you like to try again?")
    if restart == "yes":
        print(script())
    if restart == "no":
        print("Thank you for playing.")
        
script()

结果：

Enter 'rock', 'paper', or 'scissors': rock

The computer randomly entered "paper".
Game result: you lost!
Would you like to try again?yes
Enter 'rock', 'paper', or 'scissors': paper

The computer randomly entered "scissors".
Game result: you lost!
Would you like to try again?

Answer 3

在下面这部分代码中，当您调用 user_win() 时，您没有传递玩家和对手的参数，因此您会收到此错误。

def script():
    print(play())
    print(user_win())

相反，您可以这样做：

#modify the play section to return the choices
def play():
    user = input("Enter 'rock', 'paper', or 'scissors': ").lower()
    computer = random.choice(['rock', 'paper', 'scissors'])
    return [computer,computer]

def script():
    print(user_win(play()[0],play()[1]))

Answer 4

#Friend 你没有在 user_win 中传递任何参数，这就是你收到 #the 错误的原因。

这里对您的代码进行了一些修改，现在您可以轻松玩游戏了。

随机导入

def user_win（玩家，对手）：

if (player == 'rock' and opponent == 'scissors') or (player == 'scissors' and opponent == 'paper') or (
        player == 'paper' and opponent == 'rock'):
    
    return 'Game result: you won!\n'

elif player == opponent:
    
    return 'Game result: it\'s a tie!\n'

elif player != 'rock' or player != 'paper' or player != 'scissors':
    
    return 'Oops, You lose.'

else:
    
    return 'You entered a wrong word !'

定义脚本（）：

user = input("Enter 'rock', 'paper', or 'scissors': ").lower()

computer = random.choice(['rock', 'paper', 'scissors'])

print(f"'\nThe computer randomly entered : {computer} ")

print(user_win(user, computer))

restart = input("Would you like to try again? write yes(y)/ no(n) : ")

if restart == "yes" or restart == "y":
    
    print(script())
    
elif restart == "no" or restart == "n":
    
    print("Thank you for playing.")
    
    exit()

if name == 'ma​​in'：

script()