signum() not in math?

[Andy Todd]

slinkp23 at yahoo.com (Paul Winkler) wrote in
<slrn9sibue.13b.slinkp23 at roaddog.armsnet>: 

>On Sat, 13 Oct 2001 06:14:46 -0400, Tim Peters <tim.one at home.com> wrote:
>>I won't find it embarrassing, no; it's more embarrassing that we
>>haven't invented a % format code to convert integers to Roman numerals,
>>which is a more frequent topic on the newsgroup, and wrt support for
>>which Python severely lags behind Common Lisp <wink>.
>
>A format code deserves a wink, but a function or two could be handy --
>I think I'll throw together something with Roman numerals for the ASPN
>cookbook, it doesn't have any.
>
>--Paul Winkler
>

Why not have a look at the work Mark Pilgrim has done in Chapter 6 of 
diveintopython (http://diveintopython.org/) This chapter on unit testing 
includes a fully functioning roman to decimal and decimal to roman 
converters, and they come with extensive unit tests.

You could either use it as a basis for your function or get his permission 
to post it to the cookbook.

Regards,
Andy
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