On Fri, Nov 21, 2008, Dinesh B Vadhia wrote: > > That's right, it is the Decimal module I'm trying to understand. And, > it is how to represent a decimal floating point number as a > common/vulgar fraction eg 1.234 = 1234/1000. How do you do this using > the Decimal module? The motivation is to avoid floating point > calculations and use integers only (don't ask why!). Cheers!
I can understand why if one is writing accounting applications that have to be accurate to the penny (or whatever in the local currency). Accountants and auditors don't like rounding errors. The accounting system I wrote in the mid-80s, and still use today, is written mostly in C, and handles all monitary calculations in cents in long integers with appropriate input and output routines to make them look to the world as it would expect. There was (is?) a FixedPoint package in python that I use for handling dollar amounts. It came out before the Decimal type, and I am not fixing something that works. The only machines I worked on extensively that handled decimal arithmatic very well were the Burroughs Medium Systems B-2500 through B-4800 which did everything in decimal which made a lot of sense since they were designed primarily to run COBOL accounting applications. Bill -- INTERNET: [EMAIL PROTECTED] Bill Campbell; Celestial Software LLC URL: http://www.celestial.com/ PO Box 820; 6641 E. Mercer Way Voice: (206) 236-1676 Mercer Island, WA 98040-0820 Fax: (206) 232-9186 Scientists are explorers. Philosophers are tourists. -- Richard Feynman _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor