find string in file

[Tim Chase]

> I'm neophite about python, my target is to create a programa that
> find  a specific string in text file.
> How can do it?

 >>> FNAME1 = 'has.txt'
 >>> FNAME2 = 'doesnt_have.txt'
 >>> TEXT = 'thing to search for'
 >>> TEXT in file(FNAME1).read()
True
 >>> TEXT in file(FNAME2).read()
False

or that may not be what your teacher wants, but if you give the 
homework problem and what you've tried, we might be able to give 
you some more quality guidance. :)

The above is *really* *bad* code...horribly suboptimal especially 
as files get large.  It only returns a boolean value.  You might 
prefer to enumerate the file's contents and, if any line contains 
the search-text, return that line offset without reading the rest 
of the file.

-tkc