[Tutor] Another parsing question

[Alan Gauld]

"Jay Mutter III" <jmutter at uakron.edu> wrote

> for line in s:
>     jay = patno.findall(line)
>     jay2 = "".join(jay[0])
>     print jay2
>
> and it prints fine up until line 111 which is a line that had
> previously returned [ ] since a number didn't exist on that line and
> then exits with

> IndexError: list index out of range

Either try/catch the exception or add an
if not line: continue  # or return a default string

> And as long as i am writing, how can I delete a return at the end of
> a line if the line ends in a certain pattern?
>
> For instance, if line ends with the abbreviation  No.

if line.endswith(string): line = line.rstrip()

> I want to join the current line with next line.
> Are lists immutable or can they be changed?

lists can be changed, tuples cannot.

HTH,

-- 
Alan Gauld
Author of the Learn to Program web site
http://www.freenetpages.co.uk/hp/alan.gauld