On Jan 11, 10:21 am, "Steven W. Orr" <[EMAIL PROTECTED]> wrote: > On Thursday, Jan 11th 2007 at 11:41 +0100, quoth robert: > > =>[EMAIL PROTECTED] wrote:=>> Hi, > =>> Frequently I get to do like this: > =>> a = (1, 2, 3, 4) # some dummy values > =>> b = (4, 3, 2, 1) > =>> import operator > =>> c = map(operator.add, a, b) > =>> > =>> I am finding the last line not very readable especially when I combine > =>> couple of such operations into one line. Is it possible to overload > =>> operators, so that, I can use .+ for element wise addition, as, > =>> c = a .+ b > =>> which is much more readable. > =>> > =>> Similarly, I want to use .- , .*, ./ . Is it possible to do? > => > =>import numpy > => > =>You'll not even need dots > > I'm very new so my plea to be gentle is still on. > > I just looked at the numpy package. Seems very cool, but for the life of > me I didn't understand the method by which python allows for creation of > infix operators. Can someone please explain or point me to a reference?
Python doesn't allow the creation of new operators, but you can overload the existing ones (except for "and" and "or"). This is done by implementing the methods __add__, __sub__, __mul__, etc. http://docs.python.org/ref/specialnames.html -- http://mail.python.org/mailman/listinfo/python-list
