A periodically annoying limitation of Python properties on instances isthat you cannot remove or replace a property. (You can implement del in your property, but this is not the same thing.)

This restriction exists because properties are actually attributes onthe class, not attributes on the instances. Because of how attributelookup works, you can't even sneak a replacement in through theinstance's __dict__ .

This means that you can't use properties to implement a highly efficient'generate once and

This week, we:

• got 13,022 messages from 240 different IP addresses.
• handled 18,021 sessions from 1,234 different IP addresses.
• received 169,572 connections from at least 5,382 different IPaddresses.
• hit a highwater of 43 connections being checked at once.

Volume is about the same as last week ,although evidently we got a big burst of connections some timethis week.

I recently got around to setting up a web site for a top level .orgdomain that has existed for more than a decade but previously neverhad a website or even had a 'www..org' host defined in its DNSrecords. I did this with a name-based virtual host on a machine that hadnot previously been running a web server on port 80.

Within minutes , crackers were poking that virtual host in an attemptto exploit a PHP vulnerability; by contrast, it