""" Just for the Fun of It. [~tm] More in a similar vein.... These exercises may seem pretty pointless, but I remember coming from FoxPro to Python how excited I was by such long ints, then still a separate type from ints proper. The Decimal object had yet to join us back then. I feel programs below are like ritual welcoming ceremonies in that they show off the kinds of abilities our new circus animal brings to our circus.
Apologies in advance for any unwanted wrapping. These give the idea but if you want to cut and paste / run, some tweaking may be in order to achieve runnability. A couple identities involving Phi: http://www.flickr.com/photos/kirbyurner/13432252025/ You might just want to show something these computers can do that a mere calculator cannot easily duplicate. These are "monster truck" decimals versus the abbreviated ones in most textbooks. """ digits = """1.61803398874989484820458683436563811772030917980576286213544862270526046281890 244970720720418939113748475408807538689175212663386222353693179318006076672635 443338908659593958290563832266131992829026788067520876689250171169620703222104 321626954862629631361443814975870122034080588795445474924618569536486444924104 432077134494704956584678850987433944221254487706647809158846074998871240076521 705751797883416625624940758906970400028121042762177111777805315317141011704666 599146697987317613560067087480710131795236894275219484353056783002287856997829 778347845878228911097625003026961561700250464338243776486102838312683303724292""".replace("\n","") import decimal with decimal.localcontext() as context: context.prec = len(digits)-1 phi = decimal.Decimal(digits) print(phi**2 + phi**-2) # Identity 1 (== 3) print(8 * phi**2 - phi**6) # Identity 2 (== 3) # and so they equal each other, see Flickr comments for more # http://www.flickr.com/photos/kirbyurner/13432252025/ (DK = David Koski) OUTPUT: 2.9999999999999999999999999999999999999999999999999999999999999999999999999999 999999999999999999999999999999999999999999999999999999999999999999999999999999 999999999999999999999999999999999999999999999999999999999999999999999999999999 999999999999999999999999999999999999999999999999999999999999999999999999999999 999999999999999999999999999999999999999999999999999999999999999999999999999999 999999999999999999999999999999999999999999999999999999999999999999999999999999 999999999999999999999999999999999999999999999999999999999999999999999999999999 999999999999999999999999999999999999999999999999999999999999999999999999999999 8 3.0000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000000 000000000000000000000000000000000000000000000000000000000000000000000000000002 On Tue, Mar 4, 2014 at 7:23 PM, Kirby Urner <kur...@oreillyschool.com>wrote: > """ > Just for Fun > > A quick sketch of a Context Manager construct. > > A context manager is a type instance with an > __enter__ and __exit__ protocol, and designed > to work with a suite indented under a "with statement" > > (cc) Kirby Urner, MIT License > O'Reilly School of Technology > Sebastopol, CA > > With thanks to: > http://www.greatplay.net/uselessia/articles/e2-1000.html > """ >
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