printing to files in python

[Tom Hanks]

"Matthew Wilson" <mwilson at sarcastic-horse.com> wrote in message news:<mailman.1064946050.8907.python-list at python.org>...
> >>> str = "d1: %s, probability: %0.2f" % (d1, prob)
> >>> outfile = open("out.txt", "w")
> >>> outfile.write(str)
> 
> I get errors.  What am I missing?

What are you missing? You are missing including your actual errors 
in this question.

The only error I get when running your code (Python 2.3, Windows)
is "d1" and "prob" aren't defined. If I fix that then "out.txt" is 
written as expected.

TTFN,
Tom.