Help with a regex? (solved)

[deanhystad]

It probably gave you trouble because of the non-greedy matching. Another possibility is you might have used a control sequence where you wanted a backslash.

Why not grab all the digits instead of looking for the character after the digits?

import re

pattern = re.compile(r'DJI_(\d+)')

matches = re.findall(pattern, 'DJI_0991.MP4 DJI_0992 - testing.MP4 JI_0993 - testing.MP4 DJI 0994.MP4')
 
print(matches)

Output:
['0991', '0992']