我试图创建一个生成填充的数独网格的程序，但由于某种原因，我在生成几行后得到了一个无限循环，并且它从未输出完成的网格。每次它生成不同数量的正确行，然后一遍又一遍地重复，而不创建任何新行。
这是我的代码：
import random
def generate_sudoku():
sudoku_grid_generated = [[0 for _ in range(9)] for _ in range(9)]
is_valid_grid = False
for row in range(9):
for col in range(9):
while True:
i_counter = 0
j_counter = 0
valid_grid = 0
generated_number = random.randint(1, 9)
if 0 <= row <= 2 and 0 <= col <= 2:
if generated_number not in [sudoku_grid_generated[0][0], sudoku_grid_generated[0][1], sudoku_grid_generated[0][2],
sudoku_grid_generated[1][0], sudoku_grid_generated[1][1], sudoku_grid_generated[1][2],
sudoku_grid_generated[2][0], sudoku_grid_generated[2][1], sudoku_grid_generated[2][2]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 3 <= row <= 5 and 0 <= col <= 2:
if generated_number not in [sudoku_grid_generated[3][0], sudoku_grid_generated[3][1], sudoku_grid_generated[3][2],
sudoku_grid_generated[4][0], sudoku_grid_generated[4][1], sudoku_grid_generated[4][2],
sudoku_grid_generated[5][0], sudoku_grid_generated[5][1], sudoku_grid_generated[5][2]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 6 <= row <= 8 and 0 <= col <= 2:
if generated_number not in [sudoku_grid_generated[6][0], sudoku_grid_generated[6][1], sudoku_grid_generated[6][2],
sudoku_grid_generated[7][0], sudoku_grid_generated[7][1], sudoku_grid_generated[7][2],
sudoku_grid_generated[8][0], sudoku_grid_generated[8][1], sudoku_grid_generated[8][2]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 0 <= row <= 2 and 3 <= col <= 5:
if generated_number not in [sudoku_grid_generated[0][3], sudoku_grid_generated[0][4], sudoku_grid_generated[0][5],
sudoku_grid_generated[1][3], sudoku_grid_generated[1][4], sudoku_grid_generated[1][5],
sudoku_grid_generated[2][3], sudoku_grid_generated[2][4], sudoku_grid_generated[2][5]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 3 <= row <= 5 and 3 <= col <= 5:
if generated_number not in [sudoku_grid_generated[3][3], sudoku_grid_generated[3][4], sudoku_grid_generated[3][5],
sudoku_grid_generated[4][3], sudoku_grid_generated[4][4], sudoku_grid_generated[4][5],
sudoku_grid_generated[5][3], sudoku_grid_generated[5][4], sudoku_grid_generated[5][5]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 3 <= row <= 5 and 6 <= col <= 8:
if generated_number not in [sudoku_grid_generated[3][6], sudoku_grid_generated[3][7], sudoku_grid_generated[3][8],
sudoku_grid_generated[4][6], sudoku_grid_generated[4][7], sudoku_grid_generated[4][8],
sudoku_grid_generated[5][6], sudoku_grid_generated[5][7], sudoku_grid_generated[5][8]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 0 <= row <= 2 and 6 <= col <= 8:
if generated_number not in [sudoku_grid_generated[0][6], sudoku_grid_generated[0][7], sudoku_grid_generated[0][8],
sudoku_grid_generated[1][6], sudoku_grid_generated[1][7], sudoku_grid_generated[1][8],
sudoku_grid_generated[2][6], sudoku_grid_generated[2][7], sudoku_grid_generated[2][8]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 3 <= row <= 5 and 6 <= col <= 8:
if generated_number not in [sudoku_grid_generated[3][6], sudoku_grid_generated[3][7], sudoku_grid_generated[3][8],
sudoku_grid_generated[4][6], sudoku_grid_generated[4][7], sudoku_grid_generated[4][8],
sudoku_grid_generated[5][6], sudoku_grid_generated[5][7], sudoku_grid_generated[5][8]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
elif 6 <= row <= 8 and 6 <= col <= 8:
if generated_number not in [sudoku_grid_generated[6][6], sudoku_grid_generated[6][7], sudoku_grid_generated[6][8],
sudoku_grid_generated[7][6], sudoku_grid_generated[7][7], sudoku_grid_generated[7][8],
sudoku_grid_generated[8][6], sudoku_grid_generated[8][7], sudoku_grid_generated[8][8]]:
if generated_number not in sudoku_grid_generated[row]:
i_counter += 1
print(i_counter)
for r in range(9):
if sudoku_grid_generated[r][col] != generated_number:
j_counter += 1
if i_counter == 1 and j_counter == 9:
sudoku_grid_generated[row][col] = generated_number
break
else:
continue
for rows in range(9):
for cols in range(9):
if sudoku_grid_generated[rows][cols] != 0:
valid_grid += 1
if valid_grid == 81:
is_valid_grid = True
if is_valid_grid:
break
for p in sudoku_grid_generated:
print(p)
for p in sudoku_grid_generated:
print(p)
generate_sudoku()
我该如何解决？
您的代码的主要问题是它陷入无法找到单元格有效数字的情况。这会导致无限循环。为了修复它，我们需要实现一个回溯算法来生成一个有效的数独网格。
这是实现回溯的代码的修改版本：
import random
def is_valid(grid, row, col, num):
for i in range(9):
if grid[row][i] == num or grid[i][col] == num:
return False
box_row = (row // 3) * 3
box_col = (col // 3) * 3
for i in range(box_row, box_row + 3):
for j in range(box_col, box_col + 3):
if grid[i][j] == num:
return False
return True
def generate_sudoku_helper(grid, row, col):
if row == 9:
return True
if col == 9:
return generate_sudoku_helper(grid, row + 1, 0)
if grid[row][col] != 0:
return generate_sudoku_helper(grid, row, col + 1)
nums = list(range(1, 10))
random.shuffle(nums)
for num in nums:
if is_valid(grid, row, col, num):
grid[row][col] = num
if generate_sudoku_helper(grid, row, col + 1):
return True
grid[row][col] = 0
return False
def generate_sudoku():
sudoku_grid_generated = [[0 for _ in range(9)] for _ in range(9)]
generate_sudoku_helper(sudoku_grid_generated, 0, 0)
return sudoku_grid_generated
def print_sudoku(grid):
for row in grid:
print(row)
sudoku = generate_sudoku()
print_sudoku(sudoku)
generate_sudokugenerate_sudoku_helperprint_sudoku当你运行代码时，它会生成一个有效的数独网格并打印出来。回溯算法确保代码不会陷入无限循环，因为如果它到达无效状态，它将回溯并尝试不同的数字。