License of code in Guido's essays(http://www.python.org/doc/essays/).

[Kerim]

I don't want to bother Guido van Rossum so this question is to this
group.
I'd like to use(in commercial product) code for, say, find_path
function written in "Implementing
Graphs"(ttp://www.python.org/doc/essays/graphs.html). Surely I can
reimplement this code by myself, but what if I have no time for the
moment.
Is it enough put thanks to Guido in the product for this code(yes,
thanks for the whole Python are much bigger, but anyway)?

Kerim.