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22 Commits

Author SHA1 Message Date
Jeffrey Yasskin a26cf9b760 Make int() and long() fall back to __trunc__(). See issue 2002. 2008-02-04 01:04:35 +00:00
Mark Dickinson 1dabdb25f8 Make the Rational constructor accept '3.' and '.2' as well as '3.2'. 2008-02-02 17:16:13 +00:00
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
Raymond Hettinger 2df20a3e08 Minor wordsmithing on docstring 2008-01-31 22:07:16 +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 b23dea6adb Added more documentation on how mixed-mode arithmetic should be implemented. I 
also noticed and fixed a bug in Rational's forward operators (they were
claiming all instances of numbers.Rational instead of just the concrete types).
 2008-01-31 07:44:11 +00:00
Jeffrey Yasskin 3ea7b41b58 Moved Rational._binary_float_to_ratio() to float.as_integer_ratio() because 
it's useful outside of rational numbers.

This is my first C code that had to do anything significant. Please be more
careful when looking over it.
 2008-01-27 23:08:46 +00:00
Raymond Hettinger 63c77b6175 Docstring nit 2008-01-27 10:13:57 +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 9ec7bc36fe More design notes 2008-01-25 01:46:33 +00:00
Raymond Hettinger 9c6d81f5dd Fix-up signature for approximation. 2008-01-25 01:23:38 +00:00
Raymond Hettinger 7ea82253ea Add one other review comment. 2008-01-25 01:13:12 +00:00
Raymond Hettinger 921cb5d3a3 Mark todos and review comments. 2008-01-25 00:33:45 +00:00
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