extend methods of decimal module

[Mark H. Harris]

> 
> The decimal module implements IEEE 854
> 

Thanks Terry...   ... long time.

I would like to find out if there is some iron-clad policy about extending the implementation of an IEEE standard... decimal module in this case;  I'm just thinking that this particular extension really fits the python "batteries included" philosophy. 

I guess what I'm really asking for are the same routines found in "bc -l" math library. I've finally moved my number crunching stuff to python (from bc) because the performance of "decimal" is finally way better than bc for the moment, and wrapping python are the math routines for control and processing is so much better.   Anyway, sure would be nice to have a very speedy atan() function built-in for decimal.

Thanks for the answer... I hope you enjoy the day!