如何使用re在python中解析列表

Question

I am trying to parse a list to get the individual images returned by the bash script (stored in the list errors in py script). How can I do this with "re" ?

bash script

#!/bin/bash
value(){
for entry in *
do
if expr "$(file -b $entry)" : 'JPEG ' >/dev/null; 
then
    echo -e "$entry"
fi  
done
}
value

python code

import subprocess
errors = [subprocess.check_output(['/black.sh'])]
print errors

Output

11_37_24.jpeg
11_38_02.jpeg
11_39_56.jpeg
11_40_20.jpeg
11_40_32.jpeg
11_45_03.jpeg

The list "errors" is getting assigned a string of length 1:

errors = ["11_37_24.jpeg 11_38_02.jpeg 11_39_56.jpeg 11_40_20.jpeg 11_40_32.jpeg 11_45_03.jpeg"]

However, I want to get those images separately to use it in an html page. How can I do that with "re"? Is there any other alternative?

Answer 1

I make a few assumptions (based on the example input you give):

• file names only contain digits and underscores (so I can use \\w in regex)
• words in a file name are always concatenated by underscores (no spaces)
• every file is a jpeg file

The code:

import re

errors = ["11_37_24.jpeg 11_38_02.jpeg 11_39_56.jpeg 11_40_20.jpeg 11_40_32.jpeg 11_45_03.jpeg"]

re.findall('\w+\.jpeg', errors[0])
['11_37_24.jpeg', '11_38_02.jpeg', '11_39_56.jpeg', '11_40_20.jpeg', '11_40_32.jpeg', '11_45_03.jpeg']

If my assumptions are wrong for your project, re is probably not the way to go.

EDIT

The OP used the following code (which was given in the comments):

errors[0].split('\n')