PlasmaCalcs.tools.math.nonempty_product

PlasmaCalcs.tools.math.nonempty_product(iterable)

returns the product of all elements in iterable; iterable must have at least 1 element.

Crash with TypeError if iterable has no elements.

Does not assume that 1 is the multiplicative identity.

E.g. does l[0] * l[1] * … * l[-1], where l = list(iterable).

(This is useful when using non-numeric objects which have defined __mul__ method.)

Equivalent to functools.reduce((lambda x,y: x*y), iterable).