On Apr 9, 1:22 pm, monkeys paw <mon...@joemoney.net> wrote: > On 4/9/2010 3:43 AM, Bas wrote: > > > On Apr 7, 6:15 am, Patrick Maupin<pmau...@gmail.com> wrote: > >> I should stop making a habit of responding to myself, BUT. This isn't > >> quite an acre in square feet. I just saw the 43xxx and assumed it > >> was, and then realized it couldn't be, because it wasn't divisible by > >> 10. (I used to measure land with my grandfather with a 66 foot long > >> chain, and learned at an early age that an acre was 1 chain by 10 > >> chains, or 66 * 66 * 10 = 43560 sqft.) > >> That's an exact number, and 208 is a poor approximation of its square > >> root. > > > There is no need to remember those numbers for the imperially > > challenged people: > > > In [1]: import scipy.constants as c > > scipy.constants ?? > > doesn't work for me. > > > > > In [2]: def acre2sqft(a): > > ...: return a * c.acre / (c.foot * c.foot) > > ...: > > > In [3]: acre2sqft(1) > > Out[3]: 43560.0 > > > Cheers, > > Bas > >
Basically, he's saying that, instead of remembering the very simple "66" and "10" values, you can download and install a multi-megabyte gzipped tar file for the scipy project. ;-) (Of course, you get a few nice functions thrown in for free along with your constants, but downloading scipy for its constants is like choosing a sports car for its cupholders.) -- http://mail.python.org/mailman/listinfo/python-list
