Python + strange == cool

Phil Frost indigo at bitglue.com
Wed Sep 29 01:30:35 CEST 2004


The second number in the slice is the index of the last element to be
included, exclusive. It is not an offset from the first index. Adding
the "+" does nothing; that just means "positive". As the laws of
mathematics dictate, "+n = n"; the unary + is just for symmetry with the
unary '-'.

On Tue, Sep 28, 2004 at 04:21:12PM -0700, Maboroshi wrote:
> All fine and good <below>
> 
> >>> x = ["list1", "list2", "list3", 4, 5, 6, 7]
> >>> x[1:-1]
> ['list2', 'list3', 4, 5, 6] # All good here
> 
> this struck me as weird I had an idea to mess around with lists <below>
> 
> >>> x[1:+1]
> []
> 
> now when I do this
> >>> x[1:+2]
> ['list2']
> 
> Does this puzzle anyone else
> 
> of course I am a total novice so I have no idea what I am doing here if 
> anyone has any ideas please reply



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