Is there an easy way to sort a list by two criteria?

[Jeff Schwab]

neocortex wrote:
> Hello!
> I am a newbie in Python. Recently, I get stuck with the problem of
> sorting by two criteria. In brief, I have a two-dimensional list (for
> a table or a matrix). Now, I need to sort by two columns, but I cannot
> figure out how to do that. I read somewhere that it is possible to do:
>>>> table.sort().sort()
> but it does not work.
> Can anyone help me with this?
> PS: I am using Python under Ubuntu 6.06.

You can specify an arbitrary comparison function with the cmp key to 
sort.  IOW, use table.sort(cmp=f), where f is defined to compare table 
entries (rows?) by whichever criteria are required.