Compute pi to base 12 using Python?

[Nick Craig-Wood]

mensanator at aol.com <mensanator at aol.com> wrote:
>  Nick Craig-Wood wrote:
> > mensanator at aol.com <mensanator at aol.com> wrote:
> > >  I'm using GMPY (see code).
> > [snip]
> >
> > If you are using gmpy you might as well do it like this.....
> >
> > gmpy.pi() uses the Brent-Salamin Arithmetic-Geometric Mean formula
> > for
> > pi IIRC.  This converges quadratically, and it will calculate you a
> > million places without breaking a sweat.
> 
>  It would be nice if that were documented. What do I have to do, go get
>  the documentation for the original GMP to find out what else is in GMPY
>  that they didn't include in the doc file?

"pydoc gmpy" works for me.  Not sure how you use pydoc on windows, but
you can do this...

>>> import gmpy
>>> help(gmpy)
Help on module gmpy:

NAME
    gmpy

FILE
    /usr/lib/python2.3/site-packages/gmpy.so
[snip]
Help on built-in function pi:

pi(...)
    pi(n): returns pi with n bits of precision in an mpf object
[snip]

The original gmp documentation is sensible also, since gmpy is really
just a thin wrapper to it.  There is also the gmp source code too.

-- 
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick