Python中文本文件的意外回溯

Question

當我嘗試使用此代碼寫入文本文件時，遇到「回溯（最近調用最後一次）：」錯誤。所有這三個文件都已經存在了（儘管我相信他們不應該 - 代碼應該創建它們，如果它找不到它們，不應該？），並且它們都與.py文件在同一個目錄中。我看不到我的錯誤 - 我做錯了什麼？

import random 

forename="" 
surname="" 
classno=0 
numberone=0 
numbertwo=0 
correct=False 
score=0 
ops = ["+", "x", "-"] 



while forename == "" or forename.isnumeric(): 
    forename=input("What is your first name? ") 
    if forename == "": 
     print("You have to enter your first name.") 
    if forename.isnumeric() == True: 
     print("Your name must contain letters.") 

while surname == "" or surname.isnumeric(): 
    surname=input("What is your surname? ") 
    if surname == "": 
     print("You have to enter your name.") 
    if surname.isnumeric() == True: 
     print("Your name must contain letters.") 

while classno not in [1,2,3]: 
    while True: 
     try: 
      classno=int(input("What class are you in? ")) 
      break 
     except ValueError: 
      print("That wasn't right. Please try again.") 



for x in range(10): 
    operation=random.choice(ops) 

if operation == "-": 
    numberone=random.randint(0,10) 
    numbertwo=random.randint(0,numberone) 

elif operation == "x": 
    numberone=random.randint(0,12) 
    numbertwo=random.randint(0,12) 

else: 
    numberone=random.randint(0,100) 
    numbertwo=random.randint(0,(100-numberone)) 

while True: 
     try: 
      answer=int(input("What is " + str(numberone) + str(operation) + str(numbertwo) + "? ")) 
      break 
     except ValueError: 
      print("Incorrect input. Please try again.") 


if operation=="+": 
    if answer==numberone+numbertwo: 
     correct=True 

elif operation=="-": 
    if answer==numberone-numbertwo: 
     correct=True 

else: 
    if answer==numberone*numbertwo: 
     correct=True 

if correct==True: 
    print("Correct!") 
    score=score+1 

else: 
    print("Wrong!") 

correct = False 


if classno == 1: 
    file1=open("class1.txt", "a") 
    file1.write(forename,surname,score,"\n") 
    file1.close() 

elif classno == 2: 
    file2=open("class2.txt", "a") 
    file2.write(forename,surname,score,"\n") 
    file2.close() 

else: 
    file3=open("class.text", "a") 
    file3.write(forename,surname,score,"\n") 
    file3.close() 


print("You scored",score,"out of 10.") 

編輯：這是我的問題後看到：

Answer 1

這個問題可能是當您嘗試寫入文件，在這條線：

file2.write(forename,surname,score,"\n") 

write方法只收到一個參數。構建一個字符串作爲參數傳遞。

例如：

line_to_be_written = str(forename) + " " + str(surname) + " : " + str(score) + "\n" 
file2.write(line_to_be_written) 

上述方法是容易理解的，但所推薦的Bhargav，你可以使用format爲：

line_to_be_written = '{0} {1} {2} {3}'.format(forename, surname, score, '\n') 

甚至

line_to_be_written = '%s %s %s %s' % (forename, surname, score, '\n')