问Python初学者-在多项选择测验程序中遇到问题

EN

#this is part one of the program, where the user creates and saves their data
def PartOne():
        import pickle
        import os
        from time import sleep
        os.system('cls')

        while True:
                t = input("How many questions do you have? : ")
                if t.isnumeric():
                        break
                else:
                        print("Please enter a valid number.")

        cx = list()
        ci = list()
        co = list()

        for i in range(0, int(t)):
            c = input("Please enter the question : ")
            ca = input("Please enter option A : ")
            cb = input("Please enter option B : ")
            cc = input("Please enter option C : ")
            cd = input("Please enter option D : ")
            while True:
                m = input("What option coresponds to the correct answer (a, b, c or d) : ")
                if m.lower() in ('a', 'b', 'c', 'd'):
                        cm = {"question": c, "answer": m}
                        cx.append(cm)
                        ch = {"option a": ca, "option b": cb, "option c": cc, "option d": cd}
                        ci.append(ch)
                        cu = {"question": cx, "answer": ci}
                        co.append(cu)
                        break
                else:
                    print("Invalid answer. Please enter «a», «b», «c» or «d»")

        while True:
                question_cm = input("Would you like to save? (yes or no) ")
                if question_cm.lower() in ('yes'):
                        pickle.dump(cx, open("Savedataone.dat", "wb"))
                        pickle.dump(ci, open("Savedatatwo.dat", "wb"))
                        pickle.dump(co, open("Savedatathree.dat", "wb"))
                        print("Saved!")
                        sleep(1.2)
                        break
                if question_cm.lower() in ('no'):
                        print ("Please save to use this information.")
                        sleep(1.2)
                        break
                else:
                        print("Invalid answer. Please enter yes or no.")

#This the second part of the program where the user uses what they inputed in part 1 to quiz themselves

def PartTwo():
        import pickle
        import random
        import os
        from time import sleep
        os.system('cls')

        while True:
                person = input("How much people will participate in this study session? : ")
                if person.isnumeric():
                        break
                else:
                        print("Please enter a valid answer.")

        for i in range(0, int(person)): 

                os.system('cls')
                cx = pickle.load(open("Savedataone.dat", "rb"))
                ci = pickle.load(open("Savedatatwo.dat", "rb"))
                co = pickle.load(open("Savedatathree.dat", "rb"))
                print("Study session will begin soon...")
                sleep(2)

                for cm in cx:
                        random.shuffle(cx)
                        print(cm["question"])
                        print(ci)
                        response = input("What was the correct answer (a, b, c or d)? : ")
                        if (response == cm["answer"]):
                                print("Good!")
                                continue
                        else:
                                print("Wrong...")
                                sleep(0.2)
                                print("The correct answer was", cm, ".")
                                continue
                        print("Study session is now over.")
                        sleep (1)
                print("Next person's study session will begin soon if needed.")
                sleep(1)
                print("Verification...")
                sleep(2.5)

        sleep(1.35)
        print("Study session is now over.")