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9 commits

Author SHA1 Message Date
Raymond Hettinger
a6216749fb Add support for copy, deepcopy, and pickle. 2008-01-25 00:21:54 +00:00
Raymond Hettinger
909e334e8a More code cleanup. Remove unnecessary indirection to useless class methods. 2008-01-24 23:50:26 +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
7a6eacd2ca Clean-up and speed-up code by accessing numerator/denominator directly. There's no reason to enforce readonliness 2008-01-24 18:05:54 +00:00
Raymond Hettinger
f336c8b7e9 Cleanup 2008-01-24 02:05:06 +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