[Tutor] Possible to search text file for multiple string valuesat once?

[Alan Gauld]

"Scott Stueben" <sidewalking at gmail.com> wrote

> As I think more about how to best do this, I wonder if/how python
> script would import File A with search values, File B to be 
> searched,
> and write each full line containing any of those results to File C.
> The code could be set to look for the same input file (A, with the
> search values), and the same filename to write to (File C), thus
> leaving only the prompt for the file to be searched (File B).

Thats pretty straightforward to do.

In pseudo code:

fileB = open(raw_input("Filename to search: "))
searches = [s for s in open("FileA.txt")]
results = Set()
for line in fileB:
     for s in searches:
          if s in line: results.add(line+'\n')

open("FileC.txt").writelines(results)


Not the most efficient solution but that can be tweaked
using some of the other suggestions from earlier.

HTH,


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