Python中序列化时出现EOFError

Question

这是个问题——我想把他的高分记录保存起来，然后再读取出来。当我使用 pickle.load 的时候，Python 好像认为我在试图加载一个叫做 'Pickle' 的文件。以下是我的代码：

def recieve_hiscores():
    hiscores_file = open("hiscores_file.dat", "rb")
    for i in hiscores_file:
        hiscores = pickle.load(hiscores_file)
        hiscores = str(hiscores)
        print(hiscores)

这是保存数据的代码：

def send_hiscores(score):
    hiscores_file = open("hiscores_file.dat", "ab")
    pickle.dump(score, hiscores_file)
    hiscores_file.close()

这是我遇到的错误信息：

Traceback (most recent call last):
File "C:\Python31\My Updated Trivia Challenge.py", line 106, in <module>
main()
File "C:\Python31\My Updated Trivia Challenge.py", line 104, in main
recieve_hiscores()
File "C:\Python31\My Updated Trivia Challenge.py", line 56, in recieve_hiscores
hiscores = pickle.load(hiscores_file)
File "C:\Python31\lib\pickle.py", line 1365, in load
encoding=encoding, errors=errors).load()
EOFError

别担心，如果还有其他错误，我还在学习中，但我就是搞不懂这个问题。

Answer 1

当你遍历文件时，你会得到以换行符分隔的行。这并不是获取一系列“腌黄瓜”（pickles，指的是一种数据序列化格式）的方法。出现文件结束错误是因为第一行有一个不完整的“腌黄瓜”。

试试这个：

def recieve_hiscores():
    highscores = []
    with open("hiscores_file.dat", "rb") as hiscores_file:
        try:
            while True:
                hiscore = pickle.load(hiscores_file)
                hiscore = str(hiscore)
                print(hiscore)
                highscores.append(hiscore)
        except EOFError:
            pass
    return highscores