对从文件导入的列表排序。。。Python

Question

我对python非常陌生，我希望我不会错过其他地方的修复程序。我有一个简单的程序，这是我买的一本书中的练习之一，我遇到了一个问题。我有一个程序可以打开一个文件并将其写入列表。然后用户可以用输入更新列表，当用户退出时，它用最新的内容更新列表。除了sort选项之外，一切正常。它显示文件中的分数，前面有一个单引号，并且在程序运行时没有更新分数。它也根本不分类。我试过很多不同的方法来做到这一点。我相信从长远来看，这并不重要，但我想弄清楚。在

这是密码

# High Scores
# Demonstrates list methods

scores = []
try:
    text_file = open("scores.txt", "r")
    for line in text_file:
        scores.append(line.rstrip("\n"))

    text_file.close()

except:
    raw_input("Please verify that scores.txt is placed in the correct location and run again")



choice = None
while choice != "0":


    print \
    """
    High Scores Keeper

    0 - Exit
    1 - Show Scores 
    2 - Add a Score
    3 - Delete a Score 
    4 - Sort Scores
    """

    choice = raw_input("Choice: ")
    print

    # exit
    if choice == "0":
        try:
            output_file = open("scores.txt" , "w")
            for i in scores:
                output_file.write(str(i))
                output_file.write("\n")

            output_file.close()
            print "Good-bye"
        except:
            print "Good-bye.error"

    # list high-score table
    elif choice == "1":
        print "High Scores"
        for score in scores:
            print score

    # add a score
    elif choice == "2":
        score = int(raw_input("What score did you get?: "))
        scores.append(score)

    # delete a score
    elif choice == "3":
        score = int(raw_input("Delete which score?: "))
        if score in scores:
            scores.remove(score)
        else:
            print score, "isn't in the high scores list."

    # sort scores
    elif choice == "4":
        scores.sort()
        scores.reverse()
        print scores

    # some unknown choice
    else:
        print "Sorry, but", choice, "isn't a valid choice."


raw_input("\n\nPress the enter key to exit.")

Answer 1

如果在你的文本文件中，每行只有一个分数，最好的方法是将分数转换成整数，同时接受这样的输入。在

scores = []
try:
    text_file = open("scores.txt", "r")
    for line in text_file:
        scores.append(int(line.strip()))
except:
    text_file.close()

实际上，你接受输入的方式是把一些数字留作字符串。处理这类问题的最好方法是在排序之前打印数组并查看它。祝你一切顺利。在