ANN: Experimental Number Types (Integer, Rational, Floats)

[Moshe Zadka]

On Wed, 25 Apr 2001 12:14:01 +0200, "M.-A. Lemburg" <mal at lemburg.com> wrote:
 
> Still, you have valid points here and I think Moshe should consider
> these in his PEP (that's why I put him on CC -- hi Moshe ;-)

Thanks. I try to read c.l.py, but I sometimes miss out.
I'll try to put some more words under "Open Issues". Basically,
I'm not sure if I want to make the string matcher that complicated --
also recognize "1.0 1/2"? "3/1 5/7"? "4/2 3/4" etc....
And anyway, my PEP is behind the implementation -- this *will* be fixed,
but anyone who is really interested in the future of my PEP should
definitely checkout the implementation. Currently, the implementation
recognizes these types strings --

1. "105"
2. "105.7"
3. "105.7e1"
4. "105/7"
5. "105.7/8.3"
6. "105.7e1/8.3e-2"

In other words the implementation recognizes either a single "float" literal
or two "float" literals seperated by a "/". 
Do you want me to put something like that

def rational(s)
    if type(s) is type(''):
        if ' ' in s:
            nums = s.split(' ')
            return reduce(operator.add, map(rational, nums))
        ...

That's easy enough to implement....

I can also add:

        if '+' in s:
            nums = s.split('+')
            return reduce(operator.add, map(rational, nums))

That's also easy to implement....

Something which is sorely missing from my PEP, but I'm not into adding
right now, is correct handling of Unicode. This is probably trickier
then I think ;-)
-- 
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