[Edu-sig] Re: In defense of 0, was Re: None potato, one potato, two potato, more..

[Fred Yankowski]

On Mon, Jan 05, 2004 at 10:25:09AM -0700, Trent Oliphant wrote:
> So the indexing notation [n] could be considered shorthand for [n:n+1]? 
>  You are taking a slice of len 1 starting at n?

But where [n:n+1] is a sequence of length 1, [n] is the object in that
sequence.

	>>> x = ['a', 'b', 'c', 'd']
	>>> x[2:3]
	['c']
	>>> x[2]
	'c'

If Python had a 'first' method for sequences, similar to 'car' in
Lisp, then x[n] would be roughly equivalent to x[n:n+1].first().

-- 
Fred Yankowski      fred at ontosys.com           tel: +1.630.879.1312
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