Python 将字符串与从`.readlines（）`返回的字符串进行比较总是会得到False

现在我的if语句似乎没有注册另一个变量等于一个声明的变量。我甚至已经打印了存储的变量，猜测是用来检查的，猜测和存储的变量应该是相等的

我已经尝试过使它区分大小写，并且没有。我试图显示变量，然后准确地键入它，但它就是不起作用

import random
from random import randint

loop = 0
score = 0


f = open("songs.txt", "r")
line_number = randint(0,3)
lines = f.readlines()
songname = lines[line_number]

firstletters = songname.split()
letters = [firstletters[0] for firstletters in firstletters]
print(" ".join(letters))

f.close()

f = open("artists.txt", "r")
lines = f.readlines()
artistname = lines[line_number]

print("The first letter of each word in the title of the song is: " + "".join(letters))
print("The artist of the above song is: " + artistname)

print(songname)

answer = songname

guess = input("What is your guess? ")

if guess.lower()==answer:
  score = score + 3
  print("Correct! You have earned three points, and now have a total of:",score, "points!")

else:
  print("Incorrect! You have one more chance to guess it correctly!")
  guesstwo = input("What is your second guess? ")

  if guesstwo.lower()==answer:
    score = score + 1
    print("Correct! You have earned one point, and now have a total of:",score, "points!")

  else:
    print("Incorrect! Unfortunately you have guessed incorrectly twice- therefore the game has now ended. You had a total of:",score,"points!")

如果“guess”变量等于

songname

变量，那么它应该显示

“正确！您已经获得三分，现在总共有：”，score，“points！”

消息，尽管现在它总是显示

歌曲不正确

消息

文件中存储的歌曲有：

Africa
Redding
Follow
Fleekes

---

readlines

不会从每行末尾删除换行符。如果您打印（repr（songname）），您将看到它的末尾有一个

\n

。您可以通过自己调用

strip

来解决此问题：

songname = lines[line_number].strip()

---

也许通过将答案转换成小写

if guess.lower() == answer.lower():

---

你能打印猜测和答案只是为了再次检查吗？可能是重复的，而不是将整行读取到内存中，使用

islice

直接从iterable中获取所需的行（无需读取超出实际需要的内容）。例如，

songname=next（islice（f，linenumber，None））.strip（）

。你仍然需要阅读每一行，直到你得到你想要的那一行，但是每一行不需要的内容在阅读时都会被丢弃，而不是保留在记忆中。谢谢你，但这没有什么区别——帕特里克·豪夫的建议似乎已经纠正了这一点。我非常感谢你的回信。@BenHams为什么你接受这个答案，而不是Patrick的答案？