[newbie] troubles with tuples
denismfmcmahon at gmail.com
Tue Feb 4 01:50:44 CET 2014
On Mon, 03 Feb 2014 08:50:31 -0800, Jean Dupont wrote:
> I'm looking at the way to address tuples e.g.
> tup2 = (1, 2, 3, 4, 5, 6, 7 );
> As I found out indices start with 0 in Python, so tup2 gives me 1,
> the first element in the tuple as expected tup2 gives me 2, the
> second element in the tuple as expected now here comes what surprises
> tup2[0:1] does not give me the expected (1,2) but (2,)
> what is the reason for this and how then should one get the first and
> the second element of a tuple? Or the 3rd until the 5th?
> thanks in advance and kind regards,
>>> tup = (0,1,2,3,4,5,6,7)
(2, 3, 4)
This is as I'd expect, as the notation [0:1] means:
starting from the 0th element, up to and including the element preceding
the first element
Or [m:n] means starting from the mth element, everything up to and
including the element preceding the nth element
Are you sure you got (2,) for [0:1] and not for [2:3]? Are you sure your
initial tuple is what you thought it was?
Denis McMahon, denismfmcmahon at gmail.com
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