On 7 Αύγ, 22:17, MRAB <pyt...@mrabarnett.plus.com> wrote: > Νίκος wrote: > > On 7 Αύγ, 21:24, MRAB <pyt...@mrabarnett.plus.com> wrote: > > >> Use group capture: > > >> found = re.match(r'<!-- (\d+) -->', firstline).group(1) > >> print(page_id) > > > Worked like a charm! Thanks a lot! > > > So match method here not only searched for the string representation > > of the number but also convert it to integer as well? > > > r stand for retrieve the string here? > > > and group? > > > Wehn a regex searched a .txt file when is retrieving something for it > > always retrieve it as string right? or can get it as a number as well? > > The 'r' prefix makes it a 'raw string literal'. That means that the > string literal won't treat backslashes as special. Before raw string > literals were added to the Python language I would have needed to write: > > '<!-- (\\d+) -->' > > instead. > > (Actually, that's not strictly true in this case, because \d doesn't > have a special meaning Python strings, but it's a good idea to use raw > string literals habitually when writing regexes in order to reduce the > chance of forgetting them when they _are_ necessary. Well, that's what I > think, anyway. :-))
Couln't agree more! As the saying goes, better safe than sorry! :-) -- http://mail.python.org/mailman/listinfo/python-list
