write()参数必须是str，而不是字节 [英] write() argument must be str, not bytes

问题描述

我是一名初学者程序员，并且正在为绝对初学者编写python书.我在尝试为琐事游戏编写高得分功能时遇到了一个问题.当函数'highscore(user，highscore):'被调用时，我尝试相应地分配参数，以便将信息腌制到文件中以备后用.但是我在尝试转储所需信息时遇到错误.

I'm a beginner programmer and am working through the book python for the absolute beginner. I have come across a problem trying to write a high scoring function for the trivia game. when the function 'highscore(user, highscore):' is called on I try to assign the arguments accordingly so I can pickle the information to a file for later use. however I am running into an error trying to dump the info needed.

def highscore(user, highscore):
    '''stores the players score to a file.'''
    import pickle, shelve
    user = ''
    highscore = 0
    #Hscore = shelve.open('highscore.dat', 'c')
    Hscore = open('highscore.txt', 'a')
    pickle.dump(user, Hscore)
    pickle.dump(highscore, Hscore)
    #Hscore.sync()
    Hscore.close()

由于我正在阅读本书，并且也看到了实际使用中的书架，因此我也尝试使用它们，但遇到了自己的一系列错误.因此请暂时忽略#".

since I'm working through the book and have also seen shelves in action I tried using them too but run into their own set of errors. so ignore the '#'s at this time.

是我正在生成错误的地方.我不断收到(如标题所示)写入参数错误.

at the part pickle.dump is where I'm generating an error. I keep getting (as the title suggests) a write argument error.

我不明白为什么它不能将它们识别为字符串.就像在主函数中定义它们时一样，它的确是字符串.

I don't understand why its not recognizing them as string. as when they are defined in the main function it is indeed a string..

推荐答案

您似乎正在研究一本针对Python 2的书.您需要以 binary模式打开文件；将b添加到模式:

Looks like you are working through a book aimed at Python 2. You need to open your file in binary mode; add b to the mode:

Hscore = open('highscore.txt', 'ab')

如果您的书中包含更多此类问题，那么可能至少是为了完成本书练习而切换到支持Python 3的书或安装Python 2.7的时候.

If your book contains more issues like these, it may be time to switch to one that supports Python 3 or to install Python 2.7 at least for the purposes of completing the book exercises.

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