Chris,
Thanks for all your comments and for the proposed link. It
was unknown to me.
It's true, that my IsFloat implemtation is windows specific.
On my win platform:
print PlusInf -> 1.#INF
print MinInf -> -1.#INF
print NotANumber -> -1.#IND
Note the NaN value! However I do not know how to get it
from a literal.
From IDLE:
Python 2.3.3 (#51, Dec 18 2003, 20:22:39) [MSC v.1200 32 bit (Intel)] on win32
Regards.
Jean-Michel Fauth, Switzerland