Nested Lists

grid = [[0, 0, 0], [0, 1, 0], [0, 0, 0]]

print(grid)
print(grid[1])       # the second row
print(grid[1][1])    # the center element

[[0, 0, 0], [0, 1, 0], [0, 0, 0]]
[0, 1, 0]
1