问如何创建字典并将数据保存到文本文件？(竞猜游戏python)

EN

import random #import module
print("What is your name?") #prints writing in brackets
name = input().title() #Capitalizes the first letter of the word inputted
print("What class are you in? (Enter 1, 2 or 3)") #asks the user to input a number

while True:
   try:
       class_number = int(input()) #asks for an integer input from user
   except ValueError: 
       print("Sorry, I didn't understand that, please try again") #print statement
       continue

   if class_number > 3: #if input is more than 3
       print("SORRY but that class isn't recognised, try again") #print statement
       continue
   else:
       print ("Hello,", name, "from class", class_number, "welcome to my quiz") #prints writing in brackets and anything saved in the variable "name" and "class_number"
       break #break out of loop

score = 0  #sets the variable "score" to zero
question = 0 # sets the variable "question" to zero

while question < 3:#If questions (intitally set to 0) is smaller than 10, carry out this function
   question +=1 # add one to the value of "question"
   maths = random.randint(1,3) #randomly generate a number from 1-3 and store as "maths"
   num1 = random.randint(1,10)#randomly generate an integer from 1-10 and store as "num1"
   num2 = random.randint(1,10)#randomly generate a second integer from 1-10 and store as "num2"
   if maths == 1: #if the number generated is 1 
       print(num1, "+", num2) #prints num1 + num2
       ans = num1 + num2 #sets "ans" to equal the value of num1 added to num2

   elif maths == 2: #if the number generated is 1
       print(num1, "*", num2) #print num1 multiplied by num2
       ans = num1 * num2 #sets "ans" to equal the value of num1 multiplied by num2

   else: #else run this part of code
       print(num1, "-", num2) #print num1 subtracted by num2
       ans = num1 - num2 #sets "ans" to equal the value of num1 subtracted by num2

   while True:
       try:
           user_ans = int(input()) #user inputs answer to question
       except ValueError: #runs when the user input is no an integer
           print ("SORRY but that answer isn't recognised, try again")
       else:
           break

   if user_ans == ans:
       score+=1
       print("Well done, you are CORRECT")

   else:
       print("SORRY, you are INCORRECT") #print writing in brackets
       print("The correct answer was", ans)

if score == 10: #run this part of code if "score" equals 10
       print("fantastic", name, "you got full marks!") #print statement and name 
elif score >= 6: #run this part of code if "score" is larger than or equal to 6
       print("well done, there's some improvement to be done here though", name, "you got", score, "/10")# then print statement and score
elif score <=5: #run this part of code if "score" is smaller than or equal to 5
       print("hmm, maybe some more practise would be beneficial", name, "you got", score, "/10") #then print statement and score

class_number = str(class_number) + ".txt" #this adds '.txt' to the end of the file (therefore creating a text file) so it can be used to create a file under the name of the class
file = open(class_number, 'a') #opens the file in 'append' mode so you don't delete all the information
file.write(str(name + " : ")) #writes the name and ":" to file
file.write(str(score)) #writes the score to file
file.write('\n')#writes the score to the file
file.close()#safely closes the file to save the information

view = int(input("would you like to view the scores? If yes, press 1 or not press 2"))
if view == 1:
   exit
elif view == 2:
   exit #to be completed