Re: on slices, negative indices, which are the equivalent procedures?

2021-08-16 Thread Jack Brandom
Dennis Lee Bieber writes: > On Wed, 11 Aug 2021 11:59:11 -0300, Jack Brandom > declaimed the following: > >> >>Where are these production rules coming from? They're not at >> >> https://docs.python.org/3/reference/grammar.html >> >>

Re: on slices, negative indices, which are the equivalent procedures?

2021-08-11 Thread Jack Brandom
ing-things-up, to suit yourself (hopefully). Well observed. (I suppose it is a habit of mine to try to infer the axioms of things.) [...] > On 06/08/2021 05.35, Jack Brandom wrote: >> The FAQ at >> >> https://docs.python.org/3/faq/programming.html#what-s-a-negative-inde

Re: on slices, negative indices, which are the equivalent procedures?

2021-08-09 Thread Jack Brandom
Greg Ewing writes: > On 6/08/21 12:00 pm, Jack Brandom wrote: >> It seems >> that I'd begin at position 3 (that's "k" which I save somewhere), then I >> subtract 1 from 3, getting 2 (that's "c", which I save somewhere), then >> I sub

Re: on slices, negative indices, which are the equivalent procedures?

2021-08-06 Thread Jack Brandom
"Michael F. Stemper" writes: > On 05/08/2021 12.35, Jack Brandom wrote: >> The FAQ at >>https://docs.python.org/3/faq/programming.html#what-s-a-negative-index >> makes me think that I can always replace negative indices with >> positive >> ones ---

on slices, negative indices, which are the equivalent procedures?

2021-08-06 Thread Jack Brandom
For instance, I can reverse a "Jack" this way: >>> s = "Jack Brandom" >>> s[3 : -13 : -1] 'kcaJ' I have no idea how to replace that -13 with a positive index. Is it possible at all? But this example gives me the idea that perhaps each slice is e