python - Create new lists with del function -

i have list

a = ['a', 'b', 'c'] 

and want create function delete print new list lists
['a', 'b'], ['b', 'c'] , ['a', 'c'].

my main goal here designing function return set of lists consisting of main list without element of it.

what want combinations of length n-1 n length of list.

>>> itertools import combinations >>> = ['a', 'b', 'c'] >>> map(list, combinations(a, len(a)-1)) [['a', 'b'], ['a', 'c'], ['b', 'c']] 

this give list of lists. note set of lists requested not possible because lists not hashable.