[Tutor] regex question

[Wayne Werner]

On Tue, Jan 4, 2011 at 9:37 AM, Richard D. Moores <rdmoores at gmail.com>wrote:

> I use
>
> regex = ".*" + search + ".*"
> p = re.compile(regex, re.I)
>
> in finding lines in a text file that contain search, a string entered
> at a prompt.
>
> What regex do I use to find lines in a text file that contain search,
> where search is a word entered at a prompt?
>
> Thanks,
>
> Dick Moores


You could use (2.6+ I think):

word = raw_input('Enter word to search for: ')
with open('somefile.txt') as f:
   for line in f:
       if word in line:
            print line

You could always try a speed test, but I'm guessing that other than
extremely large files (10k+ lines) you probably won't see much speed
difference. Then again, you might!

HTH,
Wayne

p.s. I tend to only use a regex when I absolutely need to, because usually
when you try to solve one problem with a regex it becomes two problems.
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