io.UnsupportedOpperation: 阅读

Question

我正在编写一个程序来获取用户输入并确定用户输入是否在列表 'yes' 或 'no' 中。我想使用 pickle 来教我的程序新形式的是或否答案，方法是在代码看到新答案时询问用户它是 'yes' 还是 'no' 类型的答案。但是，当我尝试打开包含列表的文件时出现错误。这是我的代码：

import pickle
with open('yes.pkl', 'wb') as f:
  yes = pickle.load(f)
with open('no.pkl', 'wb') as f:
  no = pickle.load(f)
no = ["no", "never", "why should i", "nope", "noo", "nop", "n", "why", "no way", "not in a million years"]
yes = ["yes", "okay", "sure", "why not", "fine", "yah", "yeah", "y", "yee", "yesh", "yess", "yup", "yeppers", "yupperdoodle", "you bet"]
def closedq(x):
  if x in no:
    print("Meany.")
    quit()
  if x in yes:
    print()
  else:
    time.sleep(1)
    print()
    print("I have not yet learned that term.")
    time.sleep(1)
    print("Is this a yes, or a no answer?")
    yesno = input()
    if yesno in yes:
      yes.append(x)
      with open('yes.pkl', 'wb') as f:
        pickle.dump(yes, f)
    if yesno in no:
      no.append(x)
      with open('no.pkl', 'wb') as f:
        pickle.dump(no, f)
    else:
      print("Meany.")
      quit()
    print("Thank you for your input. ")
    print()
print()
time.sleep(1)
print("Do you want to play a game?")
print()
play = input()
closedq(play)
print("Yay!")

我一直收到的错误如下。

Traceback (most recent call last):
  File "main.py", line 3, in <module>
    yes = pickle.load(f)
io.UnsupportedOperation: read

我做错了什么？

Answer 1

您的代码正在以 write-only 模式打开文件，因此从中读取以加载已腌制的数据会失败。问题在于此行（以及 no 的等效行）：\

with open('yes.pkl', 'wb') as f:

要读取文件，您需要模式 'rb'，而不是 'wb'。在代码的更下方，当您写入文件时，您会正确打开以进行写入，但您不希望它位于顶部。

请注意，当文件尚不存在时，您可能需要在代码中添加额外的逻辑。以写入模式打开 non-existent 文件没问题，您只需创建它即可。但在读取模式下，文件需要已经存在。如果文件尚不存在，将 yes 和 no 初始化为空列表可能是您想要的，但我尚未完全检查您的逻辑以了解这是否是最佳方法。

io.UnsupportedOpperation: 阅读

io.UnsupportedOpperation: read

python

pickle

unsupportedoperation