尝试加载和编辑腌制字典，得到 EOFError

Question

我正在尝试修改在一本书中找到的作为教程一部分的知识问答程序；我需要使用腌制字典保存玩家的姓名和分数。我已经使用单独的程序创建了 dat 文件，以避免从不存在的文件中读取。

这是问答程序的代码。

#Trivia Challenge
#Trivia game that reads a plain text file

import sys

def open_file(file_name, mode):
    """Open a file"""
    try:
        the_file = open(file_name, mode)
    except IOError as e:
        print("Unable to open the file", file_name, "Ending program.\n", e)
        input("\n\nPress the enter key to exit.")
        sys.exit()
    else:
        return the_file

def next_line(the_file):
    """Return next line from the trivia file, formatted."""
    line = the_file.readline()
    line = line.replace("/", "\n")
    return line

def next_block(the_file):
    """Return the next block of data from the triva file."""
    category = next_line(the_file)

    question = next_line(the_file)

    answers = []
    for i in range(4):
        answers.append(next_line(the_file))

    correct = next_line(the_file)
    if correct:
        correct = correct[0]

    explanation = next_line(the_file)

    value = next_line(the_file)

    return category, question, answers, correct, explanation, value

def welcome(title):
    """Welcome the player and get his or her name."""
    print("\t\tWelcome to Trivia Challenge!\n")
    print("\t\t", title, "\n")

def saving(player_name):
    import pickle
    f = open("trivia_scores.dat", "rb+")
    highscores = pickle.load(f)
    if player_name in highscores and score > highscores[player_name]:
        highscores[player_name] = score
        pickle.dump(highscores, f)
    elif player_name not in highscores:
        highscores[player_name] = score
        pickle.dump(highscores, f)

    print("The current high scores are as follows:")
    print(highscores)
    f.close()

def main():
    trivia_file = open_file("trivia.txt", "r")
    title = next_line(trivia_file)
    welcome(title)
    score = 0

#Get the first block
    category, question, answers, correct, explanation, value = next_block(trivia_file)
    while category:
        #Ask a question
        print(category)
        print(question)
        for i in range(4):
            print("\t", i + 1, "-", answers[i])

        #Get answer
        answer = input("What is your answer?: ")

        #Check answer
        if answer == correct:
            print("\nRight!", end=" ")
            score += int(value)
        else:
            print("\nWrong!", end=" ")
        print(explanation)
        print("Score:", score, "\n\n")

        #Get the next block
        category, question, answers, correct, explanation, value = next_block(trivia_file)

    trivia_file.close()

    print("That was the last question!")
    print("Your final score is", score)
    return score

player_name = input("First, enter your name: ")
main()
saving(player_name)
input("\n\nPress the enter key to exit.")

此时出现同名错误：

def saving(player_name):
    import pickle
    f = open("trivia_scores.dat", "rb+")
    highscores = pickle.load(f)

当问题结束时，程序尝试运行 "saving" 模块，该模块（理论上）打开 trivia_scores.dat 文件，加载高分字典，检查是否玩家的名字在字典中，如果他们当前的分数高于文件中的分数，则将其覆盖。

但由于某种原因，当程序尝试加载高分字典时，我却收到此错误消息。

EOFError: Ran out of input

我以前从未见过这个错误。从一些粗略的谷歌搜索中，我得到的印象是它与试图从空文件中读取的程序有关。但这对我来说毫无意义，因为我使用不同的程序专门创建了一个 dat 文件以防止这种情况发生：trivia_scores.dat 不是一个空文件。我什至用 Python Shell 阅读它以确保。

这个错误是什么意思，为什么 Python 不加载 dat 文件？

上下文：我正在阅读的这本书是 Python 绝对初学者，作者是 Michael Dawson。这个程序和我试图完成的挑战来自第 7 章。在我添加保存模块之前，该程序运行运行良好。

Answer 1

可能您编写的原始 trivia_scores.dat 文件已损坏（也许您没有调用 close()？）。您应该尝试创建一个新文件并向该文件添加一个预填充的字典。然后尝试从这个新文件中读取。

尝试加载和编辑腌制字典，得到 EOFError

Trying to load and edit a pickled dictionary, getting an EOFError

python

dictionary

pickle

eoferror