试图从我的列表中删除 \n 但不断出现错误

Question

所以我终于成功了，这样我就可以从我的文本文件中读取并将其添加到列表中。但现在我有一个小问题，每个值看起来像这样 6\n。我该如何解决这个问题我需要重组我的代码。 下面是代码。

错误：

Number guessing game with highscores.py", line 42, in <module>
    highscoreS = [highscores.replace("\n", "") for highscores in highscoreS]
NameError: name 'highscoreS' is not defined

虽然我已经明确定义了

from random import randint
a = True
n = randint(1,10)
guesses = 0

#If scores ever need to be reset just run function
def overwritefile():
    f = open("Numbergame.txt", "w")
    f.close()

#overwritefile()
#Guessing Game Code
while a == True:
    guess = int(input("What is your guess? \nEnter a number!"))
    if guess > n:
        print("Guess is too high! \nTry Again!")
        guesses += 1
    elif guess < n:
        print("Guess is too low! \nTry Again!")
        guesses += 1
    else:
        guesses += 1
        a = False

print("You guessed the number! \nIt was " + str(n) + "\nIt took you: " + str(guesses) + " guesses")

#Adding Score to the file
f = open("Numbergame.txt", "a")
f.write(str(guesses) + '\n')
f.close()


highscores = []
#Compare values and figure out if it is a new highscore
#Maybe I will use the TRY thing got taught recently might help iron out some errors
#f = open("Numbergame.txt").readlines()
with open('Numbergame.txt', 'rt') as f:
    for highscore in f:
        highscores.append(highscore)
        highscoreS = [highscores.replace('\n', '') for highscores in highscoreS]

Answer 1

“虽然我已经明确定义了”

您需要在使用它之前定义它。截至目前，highscoreS 用于定义它的同一行。正确的方法是先将所有值读入一个列表，然后然后使用你定义的列表。

highscores = []
with open('Numbergame.txt', 'rt') as f:
    for line in f:
        highscores.append(line)

# Notice this is OUTSIDE the loop
highscoreS = [hs.replace('\n', '') for hs in highscores]

要覆盖原来的highscores，可以这样做

highscores = [hs.replace('\n', '') for hs in highscores]

但是，这不必要地令人费解。不要这样做，我建议您在阅读乐谱时只需strip() 空格。

highscores = []
with open('Numbergame.txt', 'rt') as f:
    for line in f:
        highscores.append(line.strip()) # Or line.replace('\n', '')

您可能还希望将值转换为整数，在这种情况下，当您从文件中读取行时，在循环中也这样做是有意义的。

highscores = []
with open('Numbergame.txt', 'rt') as f:
    for line in f:
        highscores.append(int(line)) # No need to strip because `int()` automatically takes care of that

正如@tdelaney 所提到的，您可以将其进一步压缩为pythonic 列表理解：

with open('Numbergame.txt', 'rt') as f:
    highscores = [int(line) for line in f]