> > > Hi, > > I am multipliying two lists so that each of list As elements get multiplied > to the corresponding list Bs. Then I am summing the product. > > For example, A= [1, 2, 3] and B=[2, 2, 2] so that I get [2, 4, 6] after > multiplication and then sum it to get 12. I can do it using map like this: > > sum(map(lambda i,j:i*j, A, B)) > > But map is being dropped out in python 3? or has it already been dropped? > It appears to still work in 3.1.1. I don't know if it is going to be dropped.
> And I have heard Guido say that list comprehension do a better job than > map so how would we do this with list comps? > This should be equivalent. Python 3.1.1+ (r311:74480, Nov 2 2009, 15:45:00) [GCC 4.4.1] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> A=[1,2,3] >>> B=[2,2,2] >>> [i*j for i,j in zip(A,B)] [2, 4, 6] >>> sum([i*j for i,j in zip(A,B)]) 12 > Thanks, > Ali > > _______________________________________________ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > >
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