Re: [Numpy-discussion] Product of an empty sequence

[Alan G I. <ai...@am...>]

On Thu, 19 Oct 2006, Ivan Vilata i Balaguer apparently wrote:=20
>>>> numpy.prod(())=20
> 1.0
> Wouldn't be 0.0 a more natural answer?

I think it must be 1 or a TypeError.  E.g.,
http://docs.python.org/lib/built-in-funcs.html#reduce
reduce(function, sequence[, initializer])
    Apply function of two arguments cumulatively to the=20
    items of sequence, from left to right, so as to reduce=20
    the sequence to a single value. For example,=20
    reduce(lambda x, y: x+y, [1, 2, 3, 4, 5]) calculates=20
    ((((1+2)+3)+4)+5). The left argument, x, is the=20
    accumulated value and the right argument, y, is the=20
    update value from the sequence. If the optional=20
    initializer is present, it is placed before the items of=20
    the sequence in the calculation, and serves as a default=20
    when the sequence is empty. If initializer is not given=20
    and sequence contains only one item, the first item is=20
    returned.

hth,
Alan Isaac
(just a user)