-1
grid = [[0,1,1,1],
[0,0,1,0],
[0,0,1,0]]
lst = []
for rows, row in enumerate(grid) :
for cols, col in enumerate(row) :
if grid[rows][cols] in [1] :
lst.append((rows, cols))
print (lst) # lst at this point = [(0, 1), (0, 2), (0, 3), (1, 2), (2, 2)]
How...