On 24 Nov, 20:31, Christian Heimes <[EMAIL PROTECTED]> wrote: > Rock wrote: > > I appreciate the inclusion of the fractions module in Python 2.6 and > > therefore in Python 3.0. But I feel there's something missing: no > > possibility for complex rationals (or arbitrary precision) integers. I > > was just checking the complex number support in Python, compared, for > > instance, to Common Lisp and Scheme, and I realized that there was > > this subtle omission. The inclusion of rationals and arbitrary > > integers is cool, but the numeric tower (say, compared to Scheme) is > > not complete. I don't think there would be a performance hit if > > complex rationals were provided. Ordinary operations on complex > > floats, in theory, should not be affected and handled separately. But > > it would be nice to be able to do: > > > (3/4 + 1/2j) * (1/4 - j) = 11/16 - 5/8j > > > with no loss of precision. > > > Python is heavily used in math and science all over the world. We've > > even got a recent symbolic math project (sympy) that looks very > > promising, so I guess this could be an important issue. > > Nobody has submitted a PEP and patch to implement the feature in time. > There is still Python 3.1, you know? If you like to contribute the > feature then please start a discussion on the Python Ideas mailing list > (not the developer lists!). > > > Note: there exists a library that implements what I'm talking about: > >http://calcrpnpy.sourceforge.net/clnum.html > > but still I personally would have liked to see this stuff included > > natively in the new Python 3.0. > > The code depends on the CLN library which isn't suited for the Python > core. It's written in C++ and it's licensed under GPL. Neither GPL nor > LGPL software can't be integrated into the core. We also require all > code to be compatible with C89. > > Christian
Thanks Christian, will do so as soon as possible. Rock -- http://mail.python.org/mailman/listinfo/python-list
