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Well, it works... solution in Clear category for Moore Neighbourhood by apex123
def count_neighbours(grid, row, col):
NEIGHBOURS = ((row-1, col-1), (row, col-1), (row+1, col-1), (row-1, col),
(row+1, col), (row-1, col+1), (row, col+1), (row+1, col+1))
count = 0
for coord in NEIGHBOURS:
if coord[0] < 0 or coord[1] < 0:
continue
try:
if grid[coord[0]][coord[1]]:
count += 1
except IndexError:
continue
return count
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert count_neighbours(((1, 0, 0, 1, 0),
(0, 1, 0, 0, 0),
(0, 0, 1, 0, 1),
(1, 0, 0, 0, 0),
(0, 0, 1, 0, 0),), 1, 2) == 3, "1st example"
assert count_neighbours(((1, 0, 0, 1, 0),
(0, 1, 0, 0, 0),
(0, 0, 1, 0, 1),
(1, 0, 0, 0, 0),
(0, 0, 1, 0, 0),), 0, 0) == 1, "2nd example"
assert count_neighbours(((1, 1, 1),
(1, 1, 1),
(1, 1, 1),), 0, 2) == 3, "Dense corner"
assert count_neighbours(((0, 0, 0),
(0, 1, 0),
(0, 0, 0),), 1, 1) == 0, "Single"
Feb. 14, 2015
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