Having trouble with file modes

[Hendrik van Rooyen]

 "erikcw" <erikwickstrom at gmail.com> wrote:
8<--------------------------------

> #loop through patterns list and find/replace data
> for o, r in patterns:
>     data = data.replace(o, r)
>     print "Replaced %s with %s" % (o, r)
> f.write(data)
> f.close()
>
> This results in an empty file.  All of the modes I've tried either
> produce an empty file or append the data onto the end of the file.  How

I would take a hard look at what the find and replace does - it acts as if you
are replacing
*everything*   with   *nothing*....

- Hendrik