Circular iteration on tuple starting from a specific index

[Beppe]

Il giorno mercoledì 31 maggio 2017 00:18:40 UTC+2, guillaum... at giome.fr ha scritto:
> Hi Beppe !
> 
> There are some powerful tools in the standard *itertools* module, you 
> should have a look at it :)
> https://docs.python.org/3/library/itertools.html
> 
> This is what I would do to cycle over you iterable without making 
> several copies of it.
> 
> ```
> from itertools import islice, chain
> 
> def cycle_once(iterable, start):
>      return chain(islice(iterable, start, None), islice(iterable, start))
> 
> my_iterable = ('A','B','C','D','E','F','G','H')
> 
> for e in cycle_once(my_iterable, 2):
>      print(i)
> ```
for e in cycle_once(my_iterable, 2):
     print(e) 

perfect, thanks
> 
> Ps: I am pretty new to how a mailing list works. If I answered the wrong 
> way, do not hesitate to tell me :)