Sudoku Gui Grid Lines

Trying to create sudoku game using tkinter grid, got problem with the GUI grid

The problem is

blocks = [[None] * 3] * 3

it doesn't create 3 unique sublists but it creates 3 reference to the same list.

It should be

blocks = [[None for x in range(3)] for x in range(3)] 

---

I would also use

btn_cells = [[None for x in range(9)] for x in range(9)]

---

Frankly, I would write it in different way - using apppend()

blocks = [] 
for r in range(3):  # `r` like `row`
    row = []
    for c in range(3):  # `c` like `column`
        frame = tk.Frame(puzzle, bd=1, highlightbackground='light blue',
                                highlightcolor='light blue', highlightthickness=1)
        frame.grid(row=r, column=c, sticky='nsew')
        row.append(frame)
    blocks.append(row)

Generating sudoku puzzle in matrix than drawing GUI

When you generate the board, you only return the first row instead of the entire board.

Make this change in your code:

def generate_board():
    .........
    # for line in board: return line  # remove this line
    return board   # return full board

Styling a sudoku grid

The following is a slight modification of an example in the table element section in HTML5 CR, illustrating the use of colgroup for grouping columns and tbody for grouping rows. This grouping lets you set different borders around the groups than otherwise around cells.

<style>
table { border-collapse: collapse; font-family: Calibri, sans-serif; }
colgroup, tbody { border: solid medium; }
td { border: solid thin; height: 1.4em; width: 1.4em; text-align: center; padding: 0; }
</style>
<table>
  <caption>Sudoku of the day</caption>
  <colgroup><col><col><col></colgroup>
  <colgroup><col><col><col></colgroup>
  <colgroup><col><col><col></colgroup>
  <tbody>
   <tr> <td>1 <td>  <td>3 <td>6 <td>  <td>4 <td>7 <td>  <td>9
   <tr> <td>  <td>2 <td>  <td>  <td>9 <td>  <td>  <td>1 <td>
   <tr> <td>7 <td>  <td>  <td>  <td>  <td>  <td>  <td>  <td>6
  <tbody>
   <tr> <td>2 <td>  <td>4 <td>  <td>3 <td>  <td>9 <td>  <td>8
   <tr> <td>  <td>  <td>  <td>  <td>  <td>  <td>  <td>  <td>
   <tr> <td>5 <td>  <td>  <td>9 <td>  <td>7 <td>  <td>  <td>1
  <tbody>
   <tr> <td>6 <td>  <td>  <td>  <td>5 <td>  <td>  <td>  <td>2
   <tr> <td>  <td>  <td>  <td>  <td>7 <td>  <td>  <td>  <td>
   <tr> <td>9 <td>  <td>  <td>8 <td>  <td>2 <td>  <td>  <td>5
</table>

---

Related Topics