This is some code taken out of a Sudoku solver that I'm working on. I changed a bit of it to shrink it down but the fundamental issue of it is still there. If I were to run this, it would go through the solve function one time but then upon returning to the board[x][y] += 1 part of the add1 function, it returns TypeError: list indices must be integers, not list. I can't find any answers. Can't figure out why a list is being passed instead of just numbers. Please help!
def init_board():
board = [[],[],[],[],[],[],[],[],[]]
for i in board:
for x in range(0,9):
i.append(0)
return board
def add1(x, y):
board[x][y] += 1
def solve(row, column):
add1(row, column)
for row in board:
print(row)
if True:
if row == 8 and column == 8:
return
if column == 8:
row += 1
column = 0
if column < 8:
column += 1
solve(row, column)
board = init_board()
solve(0,0)
Where you put for row in board: you are iterating through board (a list of lists) and setting row to each inner list. Subsequently when you call solve(row, column), you are passing in row, which is now a list.
If that is not what you intended, change row in for row in board: to a different variable name so it doesn't clash with your existing int variable row.