python - 类型错误 : file must have 'read' and 'readline' attributes

Question

第一种方法:我试图让下面的代码从早上开始工作。我已经在 stackoverflow 和谷歌上关于 python 的教程中阅读了很多答案，我已经完成了 0 个进度。你能帮我解决这个错误吗:

Using TensorFlow backend.
Traceback (most recent call last):
  File "source_code_modified.py", line 65, in <module>
    dict1 = pickle.load(f1,encoding='bytes')
TypeError: file must have 'read' and 'readline' attributes

爆出来的代码就是这部分:

class load_train_data:
    os.open("/home/just_learning/Desktop/CNN/datasets/training_data/images", os.O_RDONLY)
    def __enter__(self):
        return self
    def __exit__(self, type, value, traceback):
        pass


class load_test_data:
    os.open("/home/just_learning/Desktop/CNN/datasets/test_data/images",os.O_RDONLY) 
    def __enter__(self):
        return self
    def __exit__(self, type, value, traceback):
        pass


with load_train_data() as f1:
   dict1 = pickle.load(f1,encoding='bytes')

第二种方法:

好的，我做到了，错误是:

Using TensorFlow backend.
Traceback (most recent call last):
  File "source_code_modified.py", line 74, in <module>
    with open_train_data() as f1:
  File "source_code_modified.py", line 47, in open_train_data
    return open('/home/just_learning/Desktop/CNN/datasets/training_data/images','rb') 
IsADirectoryError: [Errno 21] Is a directory: '/home/just_learning/Desktop/CNN/datasets/training_data/images'

代码在这些点上爆炸:

def open_train_data():
    return open('/home/just_learning/Desktop/CNN/datasets/training_data/images','rb') <--- explodes here

def open_test_data():
    return open('/home/just_learning/Desktop/CNN/datasets/test_data/images','rb')

with open_train_data() as f1:
   dict1 = pickle.load(f1)   <--- explodes here

第三种方法:我发现了这个:"IsADirectoryError: [Errno 21] Is a directory: " It is a file

我将代码更改为:

def open_train_data():
    return os.listdir('/home/just_learning/Desktop/CNN/datasets/training_data/images') 

def open_test_data():
    return os.listdir('/home/just_learning/Desktop/CNN/datasets/test_data/images')

with open_train_data() as f1:           <-------------- explodes here
   dict1 = pickle.load(f1) #,encoding='bytes')

错误是这样的:

Using TensorFlow backend.
Traceback (most recent call last):
  File "source_code_modified.py", line 74, in <module>
    with open_train_data() as f1:
AttributeError: __enter__

我通过在 github/google 中搜索解决了这个错误，这是我在上面发布的第一种方法中描述的结果......

Answer 1

使用类似的东西:

def open_test_data():
    return open('path/to/filename', 'rb')

with open_test_data() as f:
    dict1 = pickle.load(f) 

没有理由尝试为这样的事情定义自己的上下文管理器。

编辑:您最初的第一次尝试是 encoding='bytes'。根据数据的来源，您可能需要添加它。