Once upon a time, most every Unix system (or at least most every Unixsystem descended from Berkeley Unix) had a set of system logins andgroups that looked more or less identical and had more or less identicalUIDs and GIDs. This made it possible for fileserver environments to more or less have a single, globalpassword and group file that was used on all of your machines.

Those days are long over. In fact, things have swung to drasticallydifferent system logins and groups, with complete anarchy not just

Here is something that I was surprised to discover the other day : you can nest class definitions inside otherthings. In a way this is just what I should have expected given that class is an executable statement in Python, just like def is ( cf ), but I still found it surprising to see itactually happen.

At least in the simple case, the only thing that nesting a class insideanother class does is make the first class's name harder to get to; theinner class has no special