GCSE Computer Science Example NEA code

import random

try:
    rawSongs = open("songs.txt").readlines()
    rawUsers = open("users.txt").readlines()
    rawHighscores = open("highscores.txt").readlines()
except:
    print("At least one file is missing! Make sure songs.txt, users.txt and highscores.txt are all present in the working directory before running this program.")
    raise SystemExit

songs = []
for i in rawSongs:
    fields = i.split(",")
    title = fields[0]
    artist = fields[1].rstrip("\n")
    songs.append([title, artist])

users = []
for i in rawUsers:
    fields = i.split(",")
    username = fields[0]
    password = fields[1].rstrip("\n")
    users.append([username, password])

highscores = []
for i in rawHighscores:
    fields = i.split(",")
    score = int(fields[0])
    name = fields[1].rstrip("\n")
    highscores.append([score, name])

# User validation

userDetails = None

while True:
    userInput = input("Please enter your username:\n")
    for i in users:
        if i[0] == userInput:
            userDetails = i
            break
    else:
        print("Username not found!")
        continue
    break

while True:
    passInput = input("Please enter your password:\n")
    if passInput == userDetails[1]:
        print("Successfully logged in as {}!".format(userDetails[0]))
        break
    else:
        print("Incorrect password!")

# Main game loop

usedSongs = []

curSong = None

allSongsUsed = False

userScore = 0

while True:
    while True:
        temp = random.choice(songs)
        if temp not in usedSongs:
            usedSongs.append(temp)
            curSong = temp
            break
        elif len(usedSongs) == len(songs):
            print("All songs used!")
            allSongsUsed = True
            break
    if allSongsUsed:
        break

    initials = []

    for i in curSong[0].split():
        initials.append(i[0] + ("_" * (len(i) - 1)))

    scoreAdd = 3

    while True:

        print("Song: {} by {}".format(" ".join(initials), curSong[1]))

        guess = input("Please enter your guess at the song title:\n")

        if guess.upper() == curSong[0].upper():
            print("Correct!")
            userScore += scoreAdd
            print("Your score is now {}".format(userScore))
            break
        else:

            if scoreAdd == 3:
                print("Incorrect, please try again")
                scoreAdd = 1
            else:
                print("Game over! The correct answer was {}".format(curSong[0]))
                scoreAdd = 0
                print("Your score: {}".format(userScore))
                break
    if scoreAdd == 0:
        break

highscores.append([userScore, userDetails[0]])

sortedHighscores = sorted(highscores, key = lambda x: x[0], reverse = True)

print("Highscores:")

if len(sortedHighscores) >= 5:
    for i in sortedHighscores[0:5]:
        print("{} by {}".format(*i))
else:
    for i in sortedHighscores:
        print("{} by {}".format(*i))

newRawHighscores = []

for i in sortedHighscores:
    formatted = [str(i[0]), i[1]]
    new = ",".join(formatted)
    newRawHighscores.append(new)

newToWrite = "\n".join(newRawHighscores)
newHighscores = open("highscores.txt", "w")
newHighscores.write(newToWrite)
newHighscores.close()