prod() does just what you want.
On Tue, Dec 4, 2012 at 5:53 PM, Michael Orlitzky <mich...@orlitzky.com> wrote:
> I've been carrying this around in my init.sage. Is there really nothing
> like it in the library? If not, any reason not to add it?
>
> ##
>
> from functools import reduce
>
> def product(factors):
> """
> Returns the product of the elements in the list ``factors``. If
> the list is empty, we return 1.
>
> EXAMPLES:
>
> Normal integer multiplication::
>
> sage: product([1,2,3])
> 6
>
> And with symbolic variables::
>
> sage: x,y,z = SR.var('x,y,z')
> sage: product([x,y,z])
> x*y*z
>
> TESTS:
>
> The empty product is the multiplicative identity (one)::
>
> sage: product([])
> 1
>
> """
> return reduce(operator.mul, factors, 1)
>
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