[Tutor] A program that can check if all elements of the list are mutually disjoint

[Peter Otten]

On 06/06/2021 10:19, Manprit Singh wrote:
> Dear sir ,
> Thanks to Roel . Finally today I have understood the importance of standard
> library modules, I work with mostly numbers when programming , and feel
> that itertools is very very useful.
> The solution that i do agree is as follows and seems readable to me too:
> 
> import itertools
> def is_mutually_disjoint(arr):
>      comb = itertools.combinations(lst, 2)
>      return all(set(ele1).isdisjoint(ele2) for ele1, ele2 in comb)

Note that there's a bug in the above function (try running it with a 
list literal) giving you a chance to learn why global variables should 
be avoided ;)