Steven D'Aprano <steven <at> REMOVE.THIS.cybersource.com.au> writes:
> > > > operandlist1=[1,2,3,4,5] > > operandlist2=[5,4,3,2,1] > > > > and resultlist will become [6,6,6,6,6]. Using map(), I can do: > > > > map(lambda op1,op2: op1 + op2, operandlist1, operandlist2) > > If the two lists are very large, it would be faster to use this: > If the two lists are *very* large and every element in each list has the same type, you should use NumPy arrays (http://numpy.scipy.org/). >>> import numpy >>> operandlist1 = numpy.array([1, 2, 3, 4, 5]) >>> operandlist2 = numpy.array([5, 4, 3, 2, 1]) >>> resultlist = operandlist1 + operandlist2 >>> resultlist array([6, 6, 6, 6, 6]) Neil -- http://mail.python.org/mailman/listinfo/python-list
