错误：缺少 2 个必需的位置参数

Question

first of all I apologize as I know this is a basic question and I tried to find clues from other similar questions to find an answer but I haven't managed to solve my problem so far.

The error appeared in the last block of code below, where I tried adding a functionality to restart the program so the user can keep playing.

The error is "user_win() missing 2 required positional arguments: 'player' and 'opponent'"

--

Code is:

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.")

I tried entering print(user_win(player, opponent)) inside def script() and then I got the error that "player" and "opponent" are not defined. So I tried defining these variables above def script() but I didn't know how.

Answer 1

你可以从play()调用user_win(user, computer) play()因为 play 是定义每个玩家的动作的地方。

Answer 2

Just return the user and computer input from play() and pass to user_win(player, opponent) also updated elif player not in ['rock','paper','scissors']:

Code:

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()

Result:

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

In this section of your code below, when you call user_win(), you're not passing the arguments for player and opponent so you're getting this error.

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

instead, you could do this:

#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 you haven't passed any arguments in user_win you that's why you are getting #the error.

Here are some modifications in your code, now you can easily play your game.

import random

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

else:
    
    return 'You entered a wrong word !'

def script():

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 == ' main ':

script()