Help with a regex? (solved)

[wrybread]

I'm trying to isolate the number in a filename that can look like these:

DJI_0991.MP4
DJI_0992 - testing.MP4

The pattern is that it always starts with DJI_ and ends with either a period or a space.

Nevermind, solved! I don't know why this was giving me so much trouble. On the offchance anyone else comes this way:

import re

filename = "DJI_0991.MP4"

file_number = re.findall('DJI_(.+?)\W', filename)

print (file_number )