[Python] Regex - python reading strings from a list index error

I am testing a regex pattern. I not getting matches, getting an index error and not sure why. My thought is because there is no match. I'm weak with regex and not entirely sure how it should be constructed.

My ultimate goal is to read a text file into a list. Loop through the list and separate the time_stamps and messages out

regex pattern

r'(\d+/\d+/\d+ \d\d:\d\d:\d\d[.]\d\d\d\d)\n(.*)'


Test code

import re



lines = ['5/22/2025 12:30:00.1234',
'1:13.0 [test_regex]="this-is-a-test-of-regex:12345|test_of_regex|test-of-regex"']

for line in lines:
try:
time_stamp, messages = re.findall(r'(\d+/\d+/\d+ \d\d:\d\d:\d\d[.]\d\d\d\d)\n(.*)', line, re.DOTALL)[0]
except IndexError as e:
print(f'No match found {e}')
else:
print (f'time_stamp {time_stamp}, message {messages}')

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