Looking for good beginner's tutorial

[Roy Smith]

My wife wants to learn Python.  Can anybody suggest a good tutorial
for her to read?  She's a PhD molecular biologist who is a pretty
advanced Unix user.  She mucks about with Perl scripts doing things
like text processing and even some simple CGI scripts, but has no
formal programming training.

I looked at Dive Into Python, but it's going to be way over her head.
I didn't think the tutorial on www.python.org would do it for her
either.  Any other suggestions I might look at?