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Groups > comp.lang.python > #80475
| From | Grant Edwards <invalid@invalid.invalid> |
|---|---|
| Newsgroups | comp.lang.python |
| Subject | Re: What does zip mean? |
| Date | 2014-11-10 17:19 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <m3qs33$n66$1@reader1.panix.com> (permalink) |
| References | <baab02ae-09b4-4b9c-8e29-50e2581f9a7b@googlegroups.com> <m3qq8m$e0n$1@speranza.aioe.org> |
On 2014-11-10, giacomo boffi <giacomo_boffi@inwind.it> wrote:
> On 11/09/2014 11:44 AM, satishmlmlml@gmail.com wrote:
>> What does zip return in the following piece of code?
>
> To help you understanding what is the `zip` builtin, please forget
> about PKZip etc and think about the _zip fastener_ or _zipper_ in
> your bag or in your trousers
>
> In the bag you have two sequences of teeth that the zipper
> binds together in interlocking pairs
No, you don't. That's not how a zipper works. Each tooth from side A,
isn't bound with one from side B. It's bound with _two_ of them from
side B. And each of those is in turn bound with an additional tooth
from side A, and so on...
> In your program you have two lists, whose elements `zip` returns
> bound together in pairs
What the zipper on a coat does is convert two separate sequences into
a single sequence where the members alternate between the two input
sequences. IOW if we want to do something analogous to a zipper
fastener it should do this:
zip([a,b,c,d,e,f],[1,2,3,4,5,6]) => [a,1,b,2,c,3,d,4,e,5,f,6]
Item '1' is bound equally to item 'a' and 'b'. Item 'b' is bound
equally to item '1' and '2'.
--
Grant Edwards grant.b.edwards Yow! I joined scientology
at at a garage sale!!
gmail.com
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What does zip mean? satishmlmlml@gmail.com - 2014-11-09 02:44 -0800
Re: What does zip mean? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-09 21:58 +1100
Re: What does zip mean? milos zorica <miloshzorica@gmail.com> - 2014-11-09 08:06 -0300
Re: What does zip mean? giacomo boffi <giacomo_boffi@inwind.it> - 2014-11-10 17:48 +0100
Re: What does zip mean? Grant Edwards <invalid@invalid.invalid> - 2014-11-10 17:19 +0000
Re: What does zip mean? Gregory Ewing <greg.ewing@canterbury.ac.nz> - 2014-11-11 10:04 +1300
Re: What does zip mean? Cameron Simpson <cs@zip.com.au> - 2014-11-11 07:36 +1100
Re: What does zip mean? Terry Reedy <tjreedy@udel.edu> - 2014-11-10 19:39 -0500
Re: What does zip mean? giacomo boffi <pecore@pascolo.net> - 2014-11-13 23:10 +0100
Re: What does zip mean? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2014-11-14 22:06 +1100
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