I would like to give some feedback about ... http://www.checkio.org/mission/life-counter/solve/

One of your tests is: life_counter(( (0,0,0,0,0,0,1,0), (1,1,0,0,0,0,0,0), (0,1,0,0,0,1,1,1),), 129) == 2

but this field is incorrect. according the precondition field size can't be 3 * 8.

Precondition: all(len(row) == len(state[0]) for row in state)