Function count_neighbors

example_code/item_071.py:90–104

(y, x, get_cell)

print("Example 4")
def count_neighbors(y, x, get_cell):
    n_ = get_cell(y - 1, x + 0)  # North
    ne = get_cell(y - 1, x + 1)  # Northeast
    e_ = get_cell(y + 0, x + 1)  # East
    se = get_cell(y + 1, x + 1)  # Southeast
    s_ = get_cell(y + 1, x + 0)  # South
    sw = get_cell(y + 1, x - 1)  # Southwest
    w_ = get_cell(y + 0, x - 1)  # West
    nw = get_cell(y - 1, x - 1)  # Northwest
    neighbor_states = [n_, ne, e_, se, s_, sw, w_, nw]
    count = 0
    for state in neighbor_states:
        if state == ALIVE:
            count += 1
    return count


alive = {(9, 5), (9, 6)}