Python使用变量和if语句

Question

I am doing an assignment where I have to conduct a quiz. Here is my code so far.

print("Hello and welcome to Shahaad's quiz!") #Introduction
name = input("What is your name? ")
print("Alright", name,", these will be today's topics:")  #Topics
print("a) Video Games") 
print("b) Soccer")
print("c) Geography") 
choice = input("Which topic would you like to begin with?")
if choice == 'video games' or choice == 'Video Games' or choice == 'Video games' or choice == 'a)' or choice == 'a':
    print("You picked Video Games.")
print("Question number one:")                                      #Question one
print("What is the most popular FPS (First Person Shooter) game?")
print("a) Call of Duty")
print("b) Battlefield")
print("c) Grand Theft Auto 5")
print("d) Counter Strike")       
maxGuesses = 2 #Max number of attempts for the problem
guessesTaken = 0
points = 0
question = input("Your answer: ")
if question == 'Call of duty' or question == 'call of duty' or question == 'Call Of Duty' or question == 'Call of Duty' or question == 'a' or question == 'a)':
    print("You are correct! You guessed the question on the first try!")
    points = points + maxGuesses-guessesTaken
    print("You scored",(maxGuesses-guessesTaken), "points!")
else:
    print("Incorrect!")
    print("You have", (maxGuesses-guessesTaken-1), "guesses remaining!")
    answerb = input("Your answer: ")
if answerb == 'Call of duty' or answerb == 'call of duty' or answerb == 'Call Of Duty' or answerb == 'Call of Duty' or answerb == 'a' or answerb == 'a)':
    print("You are correct!")
    points = points + maxGuesses-guessesTaken
    print("You scored", (maxGuesses-guessesTaken-1), "points!")

The problem i'm having is on line 28, where it says answerb is not defined but i did define it. I am supposed to do this quiz with terms that I have learnt and I am not allowed to use terms i haven't learnt such as while. I put else: print incorrect and put answerb == input to give the user a 2nd chance at answering. And if they get it the first try, they dont need to insert something for answerb.

Answer 1

This line...

    answerb = input("Your answer: ")

is indented too far. It will only be called in the 'else' portion of the preceding if statement.

answerb = input("Your answer: ")

Unindent it so that it's at the same level as the following if , so that it will always be called (and thus answerb will always be defined).

Answer 2

Edit:

Going by your comment as well as your code structure, I think you want to indent this part:

if answerb == 'Call of duty' or answerb == 'call of duty' or answerb == 'Call Of Duty' or answerb == 'Call of Duty' or answerb == 'a' or answerb == 'a)':
    print("You are correct!")
    points = points + maxGuesses-guessesTaken

Your code should look like this then:

print("Hello and welcome to Shahaad's quiz!") #Introduction
name = input("What is your name? ")
print("Alright", name,", these will be today's topics:")  #Topics
print("a) Video Games") 
print("b) Soccer")
print("c) Geography") 
choice = input("Which topic would you like to begin with?")
if choice == 'video games' or choice == 'Video Games' or choice == 'Video games' or choice == 'a)' or choice == 'a':
    print("You picked Video Games.")
print("Question number one:")                                      #Question one
print("What is the most popular FPS (First Person Shooter) game?")
print("a) Call of Duty")
print("b) Battlefield")
print("c) Grand Theft Auto 5")
print("d) Counter Strike")       
maxGuesses = 2 #Max number of attempts for the problem
guessesTaken = 0
points = 0
question = input("Your answer: ")
if question == 'Call of duty' or question == 'call of duty' or question == 'Call Of Duty' or question == 'Call of Duty' or question == 'a' or question == 'a)':
    print("You are correct! You guessed the question on the first try!")
    points = points + maxGuesses-guessesTaken
    print("You scored",(maxGuesses-guessesTaken), "points!")
else:
    print("Incorrect!")
    print("You have", (maxGuesses-guessesTaken-1), "guesses remaining!")
    answerb = input("Your answer: ")
    if answerb == 'Call of duty' or answerb == 'call of duty' or answerb == 'Call Of Duty' or answerb == 'Call of Duty' or answerb == 'a' or answerb == 'a)':
        print("You are correct!")
        points = points + maxGuesses-guessesTaken
    print("You scored", (maxGuesses-guessesTaken-1), "points!")

Answer 3

1. No, you haven't defined answerb properly. It is within else statement which may not have been executed. I assume what you want is to indent your last if statement because it is executed only if answer is wrong.

2. Instead of multiple question == use question in ['bla1', 'bla2', 'bla3'] . Here you don't even need this, since you don't care about capitalization. You may do question.lower() == 'bla bla bla' which will match all possible capitalizations. (same for other if 's)

3. The structure of your program is horrible. You need to rewrite it using loops and store your questions and answers in array.