[Tutor] Simple question on creating a filter

[Alan Gauld]

> In Perl I would do:
>
> while (<>)
> {
> print if line meets selection criteria;
> }


You may want to check out the fileinput module.
It takes care of multiple files being passed as input and such like
too.

> for line in sys.stdin:
> if line meets selection criteria:
> print line

>    for line in sys.stdin:
> IOError: [Errno 9] Bad file descriptor

Sorry, I'm stumped - you did import sys I assume?

Alan G.