[SciPy-user] list of arrays

[Trevis Crane]

> -----Original Message-----
> From: scipy-user-bounces at scipy.org
[mailto:scipy-user-bounces at scipy.org] On
> Behalf Of Robert Kern
> Sent: Friday, May 25, 2007 2:32 PM
> To: SciPy Users List
> Subject: Re: [SciPy-user] list of arrays
> 
> Trevis Crane wrote:
> >> -----Original Message-----
> >> From: scipy-user-bounces at scipy.org
> > [mailto:scipy-user-bounces at scipy.org] On
> >> Behalf Of Ryan May
> >> Sent: Friday, May 25, 2007 1:57 PM
> >> To: SciPy Users List
> >> Subject: Re: [SciPy-user] list of arrays
> >>
> >> Trevis Crane wrote:
> >>> Hi,
> >>>
> >>> If I have a list of arrays, what's the best way of getting the
last
> >>> element of each array without using a for-loop?
> >>>
> >> [array[-1] for array in list]
> >
> > [Trevis Crane]
> >
> > I know I'm often dense, but I'm unsure how to implement this
suggestion.
> > Here's some code to clarify what I mean:
> >
> > from numpy import *
> > a = array([1,2,3])
> > b = array([4,5,6])
> > c = array([7,8,9])
> >
> > d = []
> > d.append(a)
> > d.append(b)
> > d.append(c)
> >
> > Now, d is a list containing three arrays, a,b and c.  I assume you
> > suggest something like this:
> >
> > d[array[-1] for array in d]
> >
> > But this returns a syntax error.  I'm sure I'm missing something but
not
> > sure what.
> 
> Exactly this:
> 
>   e = [array[-1] for array in d]
[Trevis Crane] 
 
Gotcha.  Thanks.

> 
> No more. No less.
> 
> --
> Robert Kern
> 
> "I have come to believe that the whole world is an enigma, a harmless
enigma
>  that is made terrible by our own mad attempt to interpret it as
though it had
>  an underlying truth."
>   -- Umberto Eco
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