我会先检查文件是否为空:

import os

scores = {} # scores is an empty dict already

if os.path.getsize(target) > 0:      
    with open(target, "rb") as f:
        unpickler = pickle.Unpickler(f)
        # if file is not empty scores will be equal
        # to the value unpickled
        scores = unpickler.load()

同样，open(target， 'a').close()在你的代码中什么也不做，你不需要使用;。

如你所见，这实际上是一个自然错误。

从Unpickler对象中读取数据的典型构造如下所示。

try:
    data = unpickler.load()
except EOFError:
    data = list()  # or whatever you want

简单地引发EOFError，因为它正在读取一个空文件，它只是意味着文件结束。

pickle文件很可能是空的。

如果要复制和粘贴代码，那么覆盖pickle文件非常容易。

例如，下面写一个pickle文件:

pickle.dump(df,open('df.p','wb'))

如果你复制这段代码重新打开它，但忘记把'wb'改为'rb'，那么你会覆盖文件:

df=pickle.load(open('df.p','wb'))

正确的语法是

df=pickle.load(open('df.p','rb'))

from os.path import getsize as size
from pickle import *
if size(target)>0:
    with open(target,'rb') as f:
        scores={i:j for i,j in enumerate(load(f))}
else: scores={}

#line 1. we importing Function 'getsize' from Library 'OS' sublibrary 'path' and we rename it with command 'as' for shorter style of writing. Important is hier that we loading only one single Func that we need and not whole Library! line 2. Same Idea, but when we dont know wich modul we will use in code at the begining, we can import all library using a command '*'. line 3. Conditional Statement... if size of your file >0 ( means obj is not an empty). 'target' is variable that schould be a bit earlier predefined. just an Example : target=(r'd:\dir1\dir.2..\YourDataFile.bin') Line 4. 'With open(target) as file:' an open construction for any file, u dont need then to use file.close(). it helps to avoid some typical Errors such as "Run out of input" or Permissions rights. 'rb' mod means 'rea binary' that u can only read(load) the data from your binary file but u cant modify/rewrite it. Line5. List comprehension method in applying to a Dictionary.. line 6. Case your datafile is empty, it will not raise an any Error msg, but return just an empty dictionary.

if path.exists(Score_file):
      try : 
         with open(Score_file , "rb") as prev_Scr:

            return Unpickler(prev_Scr).load()

    except EOFError : 

        return dict() 

我会先检查文件是否为空:

import os

scores = {} # scores is an empty dict already

if os.path.getsize(target) > 0:      
    with open(target, "rb") as f:
        unpickler = pickle.Unpickler(f)
        # if file is not empty scores will be equal
        # to the value unpickled
        scores = unpickler.load()

同样，open(target， 'a').close()在你的代码中什么也不做，你不需要使用;。