训练 '\\x00' s 和 TypeError: stat() 参数 1 必须是没有空字节的编码字符串，而不是 str

Question

I have a json file where I stored path to several files like this:

>> head test_data.json 
data/Benign/P_00004_LEFT_CC.tif
data/Benign/P_00004_LEFT_MLO.tif
data/Benign/P_00004_RIGHT_MLO.tif
data/Benign/P_00018_RIGHT_CC.tif

Now the problem is when I read the file in python and save each line in an array I have trailing \\x00\\x00\\x00\\x00\\x00 at the end of line. I tried str.rstrip() and str.rstrip('\\n') but had no luck.

This is causing problem when I try to check the existence of paths using os.path.exists() like following

if os.path.exists(path_list[0]):
       img1 = self.loader(path_list[0])
        ........

I am getting error at os.path.exists()

TypeError: stat() argument 1 must be encoded string without null bytes, not str

How can I resolve this issue?

Answer 1

You can use rstrip('\\x00') , or you can use rstrip('\\x00\\n') to strip both '\\n' and \\x00' concurrently:

>>> s = 'data/Benign/P_00004_LEFT_CC.tif\x00\x00\x00\x00\x00\n'
>>> s.rstrip('\n\x00')
'data/Benign/P_00004_LEFT_CC.tif'

That being said, I would ask myself how NULL-characters occur in the file in the first place.

You can process the list of path_list in batch by using:

path_list = [item.rstrip('\n\x00') for item in path_list]

before using the path_list when processing the file names.