python中的EOFError

Question

我在下面代码的第87行得到了一个EOFError：

import random
def printDice(diceList):
    upperLine=" _____     _____     _____     _____     _____"
    line1="|" 
    line2="|"
    line3="|"
    lowerLine=" -----    -----    -----    -----    -----"
    for i in range(len(diceList)):
        if(diceList[i]==1):
            line1+="     "
        elif(diceList[i]==2):
            line1+="*    "
        elif(diceList[i]==3):
            line1+="*    "
        elif(diceList[i]==4):
            line1+="*   *"
        elif(diceList[i]==5):
            line1+="*   *"
        else:
            line1+="*   *"
        if(i==4):
            line1+="|"
        else:
            line1+="|  |"
    for i in range(len(diceList)):
        if(diceList[i]==1):
            line2+="  *  "
        elif(diceList[i]==2):
            line2+="     "
        elif(diceList[i]==3):
            line2+="  *  "
        elif(diceList[i]==4):
            line2+="     "
        elif(diceList[i]==5):
            line2+="  *  "
        else:
            line2+="*   *"
        if(i==4):
            line2+="|"
        else:
            line2+="|  |"
    for i in range(len(diceList)):
        if(diceList[i]==1):
            line3+="     "
        elif(diceList[i]==2):
            line3+="    *"
        elif(diceList[i]==3):
            line3+="    *"
        elif(diceList[i]==4):
            line3+="*   *"
        elif(diceList[i]==5):
            line3+="*   *"
        else:
            line3+="*   *"
        if(i==4):
            line3+="|"
        else:
            line3+="|  |"
    print upperLine
    print line1
    print line2
    print line3
    print lowerLine

tellMe="N"
print

print "The purpose of the game is to figure out the rule."
print "I can tell you three things:\n1. The name of the game is petals around a rose,  the name is important.\n2. I can tell you whether or not your guess is right and the score of the dice.\n3. I can tell you that the score is always even or 0"
print
print "At any time you can quit by typing an odd number"
go="Y"
wrongGuesses=0
while(go=="Y"):
    diceList=[]
    score=0
    rightWrong="N"
    for i in range(5):
         diceList.append(random.randrange(1,7))
    for i in range(5):
        if(diceList[i]==3):
            score+=2
        elif(diceList[i]==5):
            score+=4
    printDice(diceList)
    print
    while(rightWrong=="N"):
        guess=input("What is your guess? ")
        if(guess%2==1):
            break
        if(guess!=score):
            print "Wrong"
            wrongGuesses+=1
            tellMe=raw_input("Tell you (Y or N)? ")
            tellMe=tellMe.upper()
            if(tellMe=="Y"):
                print "The score was "+str(score)+"."
                rightWrong="Y"
            else:
                rightWrong="Y"
            print "Right"
    if(wrongGuesses%13==0 and wrongGuesses!=0):
        print"The name is very important."
    if((wrongGuesses==30) and (wrongGuesses!=0)):
        print "The maximum score is 20."
    print

我正在使用站点codepad.org来运行这个程序。我实际上已经在IDE中运行了这个程序，但是当我使用这个站点时，会弹出这个错误：

你的猜测是什么？

Traceback (most recent call last):
  Line 88, in <module>
    guess=input("What is your guess? ")
EOFError

Answer 1

您的程序从标准输入中读取用户输入。在codepad.org上运行它时，没有用户输入，尝试从标准输入读取将导致EOFError。

如果您改用站点ideone.com，它允许您指定用户输入。但是，您必须提前提供全部输入，而不是以交互方式提供。如果您的程序试图读取超过提供的输入的末尾，您将再次获得EOFError。

Answer 2

假设您使用的是Python 2.x，它应该是：

raw_input

而不是input。

在Python3.x中将raw_input更改为input

Answer 3

从技术上讲，这不是一个错误，而是一个异常。当一个内置函数出现时，通常会引发此异常

input()

返回End-Of-File(EOF)，不读取任何数据。有时我们的程序所要做的就是获取一些东西并修改它。但是当无法获取时，它将引发此异常。