Question

could you please advice how to verify in python if provided string correspond to provided pattern and return result.

For example the provided pattern is following:

< [prefix]-[id]> separated by ‘,’>|< log >”

where prefix is any number of alphabetic characters,
id is only numbers but not exceeding 5 digits,
log is any number of any characters

examples:

1. proj-123|log message
2. proj-234, proj-345|log message

I suppose the easiest way is to apply regexp which I didn’t use on python.

Thanks.

Answer 1

(?:[a-z]+-\d{1,5})(?:, [a-z]+-\d{1,5})*\|.*

it’s not clear what you want to capture, that’s why I use non-capturing groups. If you need only boolean:

>>> regex = '[a-z]+-\d{1,5}(?:, [a-z]+-\d{1,5})*\|.*'
>>> re.match(regex, 'proj-234, proj-345|log message') is not None
True

Of course, the same result can be achieved with the sequence of simple string methods:

prefs, _, log = subj.partition('|')
for group in prefs.split(', '):
    pref, _, id5 = group.partition('-')
    if id5.isdigit() and len(id5) <= 5 and pref.isalpha():
         print(pref, id5)