[Python-Dev] Tail recursion

[Tim Peters]

[Tim]
>> + - * // % ** pow and divmod on integers in Python will either
>> deliver an exact result or raise an exception (like MemoryError if
>> malloc() can't find enough space to hold an intermediate result).

[Guido]
> Except for ** if the exponent is negative.

Yup, and I do keep forgetting that -- it's just an accident due to that
we're stilling using floats to approximate rationals <wink>.