substituting list comprehensions for map()

[Sean DiZazzo]

On Nov 2, 9:01 pm, Ben Finney <ben+pyt... at benfinney.id.au> wrote:
> Anh Hai Trinh <anh.hai.tr... at gmail.com> writes:
>
> > > Yes, just about any ‘map()’ operation has a corresponding list
> > > comprehension. (Does anyone know of a counter-example, a ‘map()’
> > > operation that doesn't have a correspondingly simple list
> > > comprehension?)
>
> > Try turning this into a list comprehension:
>
> >   vectorsum = lambda *args: map(sum, zip(*args))
>
> By “this” I take you to mean “the usage of ‘map’ in this code”, since
> that's the limit of my question.
>
>     >>> vectorsum = lambda *args: [sum(items) for items in zip(*args)]
>     >>> vectorsum([1,2], [3,4], [5,6])
>     [9, 12]
>     >>> vectorsum([1,2], [3,4], [5,6], [7,8])
>     [16, 20]
>
> --
>  \       “The apparent lesson of the Inquisition is that insistence on |
>   `\         uniformity of belief is fatal to intellectual, moral, and |
> _o__)    spiritual health.” —_The Uses Of The Past_, Herbert J. Muller |
> Ben Finney

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