html tags and python

[gene.tani at gmail.com]

http://diveintopython.org/file_handling/index.html

really good tutorial on exceptions.  The whole book is well done, in
fact, I recommend it.  I also like Practical Python, and the Oreilly
"Learning Python", but they're not online.

For production purposes, you'd still do date-check on the client
(javascript) but you must do the check server-side nevertheless.