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Clear solution in Clear category for Moore Neighbourhood by BoguslawKalka
def count_neighbours(grid, row, col):
height = len(grid)
width = len(grid[0])
neigh = 0
for r in range(row-1, row+2):
if r < 0 or r >= height:
continue
for c in range(col-1, col+2):
if c < 0 or c >= width:
continue
if grid[r][c]:
neigh += 1
if grid[row][col]:
neigh -= 1
return neigh
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"
Nov. 4, 2014
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