File Python Tutorial

def open_file(file_name, mode):
    try:
        the_file = open(file_name, mode)
    except(IOError), e:
        print "Unable to open the file", file_name, "Ending program.\n", e
        raw_input("\n\nPress the enter key to exit.")
        sys.exit()
    else:
        return the_file
def next_line(the_file):
    line = the_file.readline()
    line = line.replace("/", "\n")
    return line
def next_block(the_file):
    category = next_line(the_file)
    
    question = next_line(the_file)
    
    answers = []
    for i in range(4):
        answers.append(next_line(the_file))
        
    correct = next_line(the_file)
    if correct:
        correct = correct[0]
        
    explanation = next_line(the_file) 
    return category, question, answers, correct, explanation
trivia_file = open_file("trivia.txt", "r")
title = next_line(trivia_file)
score = 0
category, question, answers, correct, explanation = next_block(trivia_file)
while category:
    print category
    print question
    for i in range(4):
        print "\t", i + 1, "-", answers[i]
    answer = raw_input("What's your answer?: ")
    if answer == correct:
        print "\nRight!",
        score += 1
    else:
        print "\nWrong.",
    print explanation
    print "Score:", score, "\n\n"
    category, question, answers, correct, explanation = next_block(trivia_file)
trivia_file.close()