11 Commits

Author	SHA1	Message	Date
Jeffrey Yasskin	dc2964b0d8	Roll back r60248. It's useful to encourage users not to change Rational ... instances.	2008-02-01 07:05:46 +00:00
Jeffrey Yasskin	ca2b69f765	Move __builtins__.trunc() to math.trunc() per ... http://mail.python.org/pipermail/python-dev/2008-January/076626.html and issue 1965.	2008-02-01 06:22:46 +00:00
Jeffrey Yasskin	38db364076	Remove unused to-be-magic methods from Rational per issue 1968. Do not port ... this patch to py3k.	2008-01-31 17:45:59 +00:00
Jeffrey Yasskin	3e1a373616	Make rational.gcd() public and allow Rational to take decimal strings, per ... Raymond's advice.	2008-01-27 05:40:35 +00:00
Raymond Hettinger	9c6d81f5dd	Fix-up signature for approximation.	2008-01-25 01:23:38 +00:00
Raymond Hettinger	a6216749fb	Add support for copy, deepcopy, and pickle.	2008-01-25 00:21:54 +00:00
Raymond Hettinger	5b0e27e50d	Add support for int(r) just like the other numeric classes.	2008-01-24 19:30:19 +00:00
Raymond Hettinger	eb461904eb	Minor clean-up and more tests.	2008-01-24 02:00:25 +00:00
Raymond Hettinger	cf10926088	Add first-cut at an approximation function (still needs rounding tweaks). Add continued fraction conversions.	2008-01-24 00:54:21 +00:00
Jeffrey Yasskin	45169fbc80	Several tweaks: add construction from strings and .from_decimal(), change ... __init__ to __new__ to enforce immutability, and remove "rational." from repr and the parens from str.	2008-01-19 09:56:06 +00:00
Jeffrey Yasskin	d7b00334f3	Add rational.Rational as an implementation of numbers.Rational with infinite ... precision. This has been discussed at http://bugs.python.org/issue1682. It's useful primarily for teaching, but it also demonstrates how to implement a member of the numeric tower, including fallbacks for mixed-mode arithmetic. I expect to write a couple more patches in this area: * Rational.from_decimal() * Rational.trim/approximate() (maybe with different names) * Maybe remove the parentheses from Rational.__str__() * Maybe rename one of the Rational classes * Maybe make Rational('3/2') work.	2008-01-15 07:46:24 +00:00