def discloseSurroundingSquares(m1, m2, x, y): ''' >>> discloseSurroundingSquares([['?', '?', '?', '?', '?'], ['?', '?', '?', '?', '?'], ['?', '?', '?', '?', '?'], ['?', '?', '?', '?', '?'], ['?', '?', '?', '?', '?']], [['0', '1', '1', '1', '0'], ['0', '1', '0', '0', '0'], ['1', '0', '0', '1', '0'], ['0', '1', '0', '1', '0'], ['1', '1', '0', '0', '0']], 0, 0) [['2', '?', '?', '?', '?'], ['?', '?', '?', '?', '?'], ['?', '?', '?', '?', '?'], ['?', '?', '?', '?', '?'], ['?', '?', '?', '?', '?']] ''' files = len(m1) columnes = len(m1[0]) if x < 0 or x >= files or y < 0 or y >= columnes: return m1 if m1[x][y] != '?': return m1 comptador_mines = 0 for i in range(max(0, x - 1), min(x + 2, files)): for j in range(max(0, y - 1), min(y + 2, columnes)): if m2[i][j] == '1': comptador_mines += 1 m1[x][y] = str(comptador_mines) return m1

The function discloseSurroundingSquares takes 4 arguments, the first one is a list of lists of strings that represents the mine field. All the characters in m1 are '?', except when a user clicks on a square, in which case m1 is changed to the number of mines in the neighbouring squares (0 to 8). The second argument is a list of lists of strings that represents the mine field with '1' for each mine and '0' for each non-mine. The third argument is the x coordinate of the square that the user clicked on, and the fourth argument is the y coordinate of the square that the user clicked on. The function returns the mine field after changing the neighbours of the square that the user clicked on to the number of neighbouring mines.