[Tutor] a code question, but don't know question's name

[Eric Brunson]

Happy Deer wrote:
> I am writing a function getdata for other people, and I want others 
> can use the function as follows.
>
> var1,var2, var3=getdata(..., ['var1','var2','var3'],...)
>
> If I can not return data column by column, I can not get the above, 
> right?

Given:

data = [ 1, 2, 3, 4, 5, 6 ]

What do you expect data[:,1] and data[:,-1] to return?

>
> On 10/7/07, *Eric Brunson* <brunson at brunson.com 
> <mailto:brunson at brunson.com>> wrote:
>
>     Happy Deer wrote:
>     > Thank all for the discussion.
>     > Maybe I can separate my question into two.
>     >
>     > First, I have experience in Matlab, where I can use "eval". I wonder
>     > whether someone knows about it.
>     >
>     > Second, if I just want to return data[:,1], ...data[:,-1] separately
>     > without knowing ahead how many columns data has. What should I do?
>
>     I'm still unsure if you even need extended slicing.
>
>     Given:
>
>     data = [ 1, 2, 3, 4, 5, 6 ]
>
>     What do you expect data[:,1] and data[:,-1] to return?
>
>
>     >
>     >
>     >
>     > On 10/7/07, *Kent Johnson* <kent37 at tds.net
>     <mailto:kent37 at tds.net> <mailto:kent37 at tds.net
>     <mailto:kent37 at tds.net>>>
>     > wrote:
>     >
>     >     Kent Johnson wrote:
>     >     > Alan Gauld wrote:
>     >     >> "Kent Johnson" < kent37 at tds.net <mailto:kent37 at tds.net>
>     <mailto:kent37 at tds.net <mailto:kent37 at tds.net>>> wrote
>     >     >>
>     >     >>>> The notation data[;,0] doesn't make sense and is an
>     error in
>     >     >>>> Python.
>     >     >>> [:,0] is an extended slice, not an error:
>     >     >>> http://docs.python.org/ref/slicings.html
>     >
>     >     We discussed this quite a bit last July:
>     >     http://mail.python.org/pipermail/tutor/2007-July/055814.html
>     >
>     >     Kent
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