Python 未定义函数？

我不确定为什么会出现游戏未定义的错误：

#!/usr/bin/python

# global variables
wins = 0
losses = 0
draws = 0
games = 0

# Welcome and get name of human player
print 'Welcome to Rock Paper Scissors!!'
human = raw_input('What is your name?')
print 'Hello ',human

# start game
game()

def game():
    humanSelect = raw_input('Enter selection: R - Rock, P - Paper, S - Scissors, Q - Quit:  ')
    while humanSelect not in ['R', 'P', 'S', 'Q']:
        print humanSelect, 'is not a valid selection'
        humanSelect = raw_input('Enter a valid option please')

    return humanSelect

main()

---

您必须先定义函数

game

，然后才能调用它

def game():
    ...

game()

---

因为，在执行语句

game（）

时，您尚未到达语句

def game（）：

，因此，game是未定义的

---

如果将

game（）

移动到

def game（）

之后，您将在

main（）

上遇到类似的错误，这很难修复，因为您似乎没有在代码中的任何地方定义名为

main

的函数。

好的，我今天花了一些时间对其进行修补，现在有以下内容：

import random
import string

# global variables
global wins
wins = 0
global losses
losses = 0
global draws
draws = 0
global games
games = 0
# Welcome and get name of human player
print 'Welcome to Rock Paper Scissors!!'
human = raw_input('What is your name? ')
print 'Hello ',human

def readyToPlay():
    ready = raw_input('Ready to Play? <Y> or <N> ')
    ready = string.upper(ready)

    if ready == 'Y':
        game()
    else:
        if games == 0:
            print 'Thanks for playing'
            exit
        else:
            gameResults(games, wins, losses, draws) 

    return

def game():

    global games
    games += 1
    human = humanChoice()
    computer = computerChoice()
    playResults(human, computer)
    readyToPlay()


def humanChoice():
    humanSelect = raw_input('Enter selection: R - Rock, P - Paper, S - Scissors:  ')
    while humanSelect not in ['R', 'P', 'S']:
        print humanSelect, 'is not a valid selection'
        humanSelect = raw_input('Enter a valid option please')
    return humanSelect

def computerChoice():
    computerInt = random.randint(1, 3)
    if computerInt == '1':
        computerSelect = 'R'
    elif computerInt == '2':
        computerSelect = 'P'
    else:
        computerSelect = 'S'

    return computerSelect

def playResults(human, computer):

    global draws
    global wins
    global losses

    if human == computer:

        print 'Draw'
        draws += 1

    elif human == 'R' and computer == 'P':

        print 'My Paper wrapped your Rock, you lose.'
        losses += 1

    elif human == 'R' and computer == 'S':

        print 'Your Rock smashed my Scissors, you win!'
        wins += 1

    elif human == 'P' and computer == 'S':

        print 'My Scissors cut your paper, you lose.'
        losses += 1

    elif human == 'P' and computer == 'R':

        print 'Your Paper covers my Rock, you win!'
        wins += 1

    elif human == 'S' and computer == 'R':

        print 'My Rock smashes your Scissors, you lose.'
        losses += 1

    elif human == 'S' and computer == 'P':

        print 'Your Scissors cut my Paper, you win!'
        wins += 1

def gameResults(games, wins, losses, draws):
    print 'Total games played', games
    print 'Wins:  ', wins, ' Losses:  ',losses, ' Draws:  ', draws
    exit

readyToPlay()

完成

def game

if game == 0:
    greeting = 'Would you like to play Rock, Paper, Scissors?'
else:
    greeting = 'Play again?'

ready = raw_input(greeting)