def test_on_some():
lg = LightGrid(6, 6)
lg.turn_on(2, 2, 3, 3)
assert lg.lights_on() == 4
from grid import LightGrid
lg = LightGrid()
with open("input.txt", "rb") as handle:
for line in handle:
lg.parse_instruction(line)
print "Lights on: %d" % lg.lights_on()
def test_on():
lg = LightGrid(3, 3)
lg.turn_on(0, 0, 2, 2)
assert lg.lights_on() == 9