itertools query

[Peter Otten]

Pradeep Patra wrote:

> Hi all,
> 
> I have written a small program to generate all the combinations of a and b
> of the array. I want (6,7) tuple also included. Can anybody suggest what
> change I should make to get 6,7 included in my output? Any suggestions

The spec is not clear to me. If you don't care about the source list you can 
use

list(all_subsets(a + b))

but that will include many more combinations, including those consisting of 
three or four elements.

>  Output:
> [(5,), (6,), (5, 6), (7,), (8,), (7, 8)]
> 
> from itertools import chain, combinations
> 
> a = [5,6]
> b = [7,8]
> ar=[]
> br=[]
> 
> def all_subsets(ss):
>     return chain(*map(lambda x: combinations(ss, x), range(1, len(ss)+1)))
> 
> for subset in all_subsets(a):
>     print(subset)
>     ar.append(subset)
> 
> for subset in all_subsets(b):
>     print(subset)
>     br.append(subset)
> 
> fr=ar+br
> print(fr)