[Tutor] Regex

[Peter Otten]

On 04/05/2021 15:15, P L wrote:
> The assignment is to search for the word ERROR and the sentence that follows it. There is no terminator to the sentence, simply a blank space, as the following:
> 
> Jan 31 01:33:12 ubuntu.local ticky: ERROR Tried to add information to closed ticket (mcintosh)

Well, if the sentence is guaranteed to be followed by a space and an 
opening parenthesis you can use that as the "terminator":

 >>> s = "Jan 31 01:33:12 ubuntu.local ticky: ERROR Tried to add 
information to closed ticket (mcintosh)"
 >>> import re
 >>> re.search(r"(ERROR .*?) \(", s).group(1)
'ERROR Tried to add information to closed ticket'

Alternatively, with a lookahead assertion:

 >>> re.search(r"ERROR .*?(?= \()", s).group()
'ERROR Tried to add information to closed ticket'