The oldest Python version on any server is 2.4.

All sysadmin scripts should be checked that they work with Python 2.6. As in: no warnings, correct working, etc. Note that the scripts should still work under 2.4.

As small example, instead of:
> import md5
do something like:
> try:
>     import hashlib
> except ImportError:
>     import md5 as hashlib

This as import md5 gives a warning under 2.6 (and maybe before that as well).

and ensure usage of md5 is correct (md5.md5, not md5.new or something).


Note: this is not about making it compatible with 3.0, scripts still need to work with Python 2.4!