demolist = ['life', 42, 'the', 'universe', 6, 'and', 7] after 'everything' was appended demolist is now: ['life', 42, 'the', 'universe', 6, 'and', 7, 'everything'] len(demolist) = 8 demolist.index(42) = 1 demolist[1] = 42 demolist[ 0 ]= life demolist[ 1 ]= 42 demolist[ 2 ]= the demolist[ 3 ]= universe demolist[ 4 ]= 6 demolist[ 5 ]= and demolist[ 6 ]= 7 demolist[ 7 ]= everything After 'the universe' was removed demolist is now: ['life', 42, 'universe', 6, 'and', 7, 'everything'] 'life' was found in demolist 'amoeba' was not found in demolist int_list is [42, 6, 7] The sorted int_list is [6, 7, 42]