Searching for a list of strings in a file with Python

Hi guys,

I'm trying to search for several strings, which I have in a .txt file line by line, on another file.
So the idea is, take input.txt and search for each line in that file in another file, let's call it rules.txt.

So far, I've been able to do this, to search for individual strings:

import re

shakes = open("output.csv", "r")

for line in shakes:
    if re.match("STRING", line):
        print line,

How can I change this to input the strings to be searched from another file?

So far I haven't been able to.

Thanks for the ideas.

Is this homework? Is this something you're trying to accomplish for a particular job? Or are you just playing around with python and learning it? What's your real question in addition to this one?

If you need to search for strings in files in a tree structure then grep is the utility you should us.

grep -irl 'some string' somedirctory/

See the man page for an explanation of the options.

As mentioned there are always better tools to be considered, but assuming it must be Python, I would suggest opening the input.txt file in the same manner and then storing
each string in something like a list / array and then on opening rules.txt you can check each line against the data contained in the list / array.