How about adding rational fraction to Python?

[Lie]

Would all these problems with floating points be a rational reason to
add rational numbers support in Python or Py3k? (pun not intended)

I agree, there are some numbers that is rationals can't represent
(like pi, phi, e) but these rounding problems also exist in floating
points, and rational numbers wouldn't be so easily fooled by something
like 1 / 3 * 3, and 1/10 (computer) is exactly 0.1 (human). The first
problem with rational is that to get an infinite precision rational,
the language would have to have an infinite length integers, which
Python have given us. The second problem with rationals is to keep
rationals in its most simple, trivial form. This can be solved with a
good GCD algorithm, which can also be a nice addition to Python's math
library.