嘗試加載和編輯腌制的字典，出現EOFError

Question

我正在嘗試修改作為教程一部分的書籍中的瑣事程序； 我需要使用腌制的字典保存球員的姓名和分數。 我已經使用單獨的程序創建了dat文件，以避免讀取不存在的文件。

這是瑣事程序的代碼。

#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.")

此時出現同義錯誤：

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

問題結束后，程序將嘗試運行“保存”模塊，（從理論上來說）該模塊將打開trivia_scores.dat文件，加載highscores詞典，檢查玩家的姓名是否在詞典中以及其當前分數高於文件中的那個，它將覆蓋它。

但是由於某種原因，當程序嘗試加載highscores字典時，卻收到了此錯誤消息。

EOFError: Ran out of input

我從未見過此錯誤。 從一些粗略的谷歌搜索中，我得到的印象是它與試圖從一個空文件中讀取的程序有關。 但這對我沒有意義，因為我專門使用其他程序創建了一個dat文件來防止這種情況的發生：trivia_scores.dat不是空文件。 我什至使用Python Shell進行閱讀以確保。

此錯誤是什么意思，為什么Python不會加載dat文件？

上下文：我正在閱讀的書是Michael Dawson撰寫的《 Python for Absolute Beginner》。 該程序和我要完成的挑戰來自第7章。在添加保存模塊之前，該程序運行良好。

Answer 1

您編寫的原始trivia_scores.dat文件可能已損壞（也許您未在其上調用close() ？）。 您應該嘗試創建一個新文件，並向該文件添加一個預填充的字典。 然后嘗試從這個新文件中讀取。