Metadata-Version: 2.4
Name: py-sudoku
Version: 2.0.0
Summary: A simple Python package that generates and solves m x n Sudoku puzzles.
Author-email: Jeff Sieu <jeffsieu@gmail.com>
License: MIT License
        
        Copyright (c) 2019 Jeff Sieu
        
        Permission is hereby granted, free of charge, to any person obtaining a copy
        of this software and associated documentation files (the "Software"), to deal
        in the Software without restriction, including without limitation the rights
        to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
        copies of the Software, and to permit persons to whom the Software is
        furnished to do so, subject to the following conditions:
        
        The above copyright notice and this permission notice shall be included in all
        copies or substantial portions of the Software.
        
        THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
        IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
        FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
        AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
        LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
        OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
        SOFTWARE.
Project-URL: Homepage, https://github.com/jeffsieu/py-sudoku
Project-URL: Issues, https://github.com/jeffsieu/py-sudoku/issues
Project-URL: GitHub, https://github.com/jeffsieu/py-sudoku
Keywords: SUDOKU
Classifier: Programming Language :: Python :: 2
Classifier: Programming Language :: Python :: 3
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Requires-Python: >=2.7
Description-Content-Type: text/markdown
License-File: LICENSE
Dynamic: license-file

# py-sudoku

A simple Python package that generates and solves m x n Sudoku puzzles.

## Install

```sh
# Python 2
pip install py-sudoku

# Python 3
pip3 install py-sudoku
```

## Usage

### Basic usage

```py
from sudoku import Sudoku
# Initializes a Sudoku puzzle with 3 x 3 sub-grid and
# generates a puzzle with half of the cells empty
puzzle = Sudoku(3).difficulty(0.5)
puzzle.show()
# +-------+-------+-------+
# | 4 1   | 3     | 7 6   |
# |   9 3 |   7   | 4   1 |
# | 2     | 1 4   |   8 3 |
# +-------+-------+-------+
# | 9 5 8 |       |     7 |
# | 3 4   |     7 |   1   |
# |   7 2 | 8 9 3 | 5 4   |
# +-------+-------+-------+
# |   8   | 2     | 3 7 4 |
# |     4 |       | 1 9 5 |
# |       |   5   | 6     |
# +-------+-------+-------+

solution = puzzle.solve()
solution.show()
# +-------+-------+-------+
# | 4 1 5 | 3 8 9 | 7 6 2 |
# | 8 9 3 | 6 7 2 | 4 5 1 |
# | 2 6 7 | 1 4 5 | 9 8 3 |
# +-------+-------+-------+
# | 9 5 8 | 4 1 6 | 2 3 7 |
# | 3 4 6 | 5 2 7 | 8 1 9 |
# | 1 7 2 | 8 9 3 | 5 4 6 |
# +-------+-------+-------+
# | 5 8 9 | 2 6 1 | 3 7 4 |
# | 6 2 4 | 7 3 8 | 1 9 5 |
# | 7 3 1 | 9 5 4 | 6 2 8 |
# +-------+-------+-------+

solution.board
# [[4, 1, 5, 3, 8, 9, 7, 6, 2],
#  [8, 9, 3, 6, 7, 2, 4, 5, 1],
#  [2, 6, 7, 1, 4, 5, 9, 8, 3],
#  [9, 5, 8, 4, 1, 6, 2, 3, 7],
#  [3, 4, 6, 5, 2, 7, 8, 1, 9],
#  [1, 7, 2, 8, 9, 3, 5, 4, 6],
#  [5, 8, 9, 2, 6, 1, 3, 7, 4],
#  [6, 2, 4, 7, 3, 8, 1, 9, 5],
#  [7, 3, 1, 9, 5, 4, 6, 2, 8]]

solution.width
# 3

solution.height
# 3
```

### Creating puzzles

m x n rectangular puzzles can be initialized using the `Sudoku(width)` or `Sudoku(width, height)` constructors.

```py
# Initializes a 3 x 5 puzzle
puzzle = Sudoku(3, 5)
# Initializes a 4 x 4 puzzle
puzzle = Sudoku(4)
puzzle = Sudoku(4, 4)
```

Use ```solve()``` to get a solved puzzle, or ```difficulty(x)``` to create a problem.

```py
# Create a 3 x 5 sub-grid problem with 0.4 difficulty (40% of cells empty)
puzzle = Sudoku(3, 5).difficulty(0.4)

# Create a solved 4 x 4 problem
puzzle = Sudoku(4).solve()
```

### Displaying puzzles

```py
solution = Sudoku(5, 3).solve()

# Shows the puzzle only
solution.show()
# +----------------+----------------+----------------+
# | 09 10 11 04 06 | 05 01 03 12 13 | 08 14 15 02 07 |
# | 03 05 07 08 01 | 02 14 15 09 04 | 06 10 11 12 13 |
# | 12 02 13 14 15 | 07 10 06 11 08 | 01 03 04 05 09 |
# +----------------+----------------+----------------+
# | 13 14 06 11 08 | 15 07 09 02 12 | 10 01 05 03 04 |
# | 10 03 15 05 02 | 13 04 08 14 01 | 12 09 07 11 06 |
# | 01 07 04 09 12 | 03 05 10 06 11 | 13 02 08 15 14 |
# +----------------+----------------+----------------+
# | 07 13 08 15 05 | 12 11 04 10 03 | 14 06 09 01 02 |
# | 06 01 12 03 09 | 08 02 07 15 14 | 11 13 10 04 05 |
# | 04 11 10 02 14 | 06 09 01 13 05 | 15 08 12 07 03 |
# +----------------+----------------+----------------+
# | 08 12 02 06 10 | 01 13 11 05 07 | 03 04 14 09 15 |
# | 05 15 09 13 11 | 14 03 12 04 10 | 02 07 06 08 01 |
# | 14 04 01 07 03 | 09 06 02 08 15 | 05 11 13 10 12 |
# +----------------+----------------+----------------+
# | 11 09 03 12 13 | 10 15 14 07 02 | 04 05 01 06 08 |
# | 15 06 14 01 04 | 11 08 05 03 09 | 07 12 02 13 10 |
# | 02 08 05 10 07 | 04 12 13 01 06 | 09 15 03 14 11 |
# +----------------+----------------+----------------+


# Use print or show_full to display more information
print(solution)
solution.show_full()
# ---------------------------
# 15x15 (5x3) SUDOKU PUZZLE
# Difficulty: SOLVED
# ---------------------------
# +----------------+----------------+----------------+
# | 09 10 11 04 06 | 05 01 03 12 13 | 08 14 15 02 07 |
# | 03 05 07 08 01 | 02 14 15 09 04 | 06 10 11 12 13 |
# | 12 02 13 14 15 | 07 10 06 11 08 | 01 03 04 05 09 |
# +----------------+----------------+----------------+
# | 13 14 06 11 08 | 15 07 09 02 12 | 10 01 05 03 04 |
# | 10 03 15 05 02 | 13 04 08 14 01 | 12 09 07 11 06 |
# | 01 07 04 09 12 | 03 05 10 06 11 | 13 02 08 15 14 |
# +----------------+----------------+----------------+
# | 07 13 08 15 05 | 12 11 04 10 03 | 14 06 09 01 02 |
# | 06 01 12 03 09 | 08 02 07 15 14 | 11 13 10 04 05 |
# | 04 11 10 02 14 | 06 09 01 13 05 | 15 08 12 07 03 |
# +----------------+----------------+----------------+
# | 08 12 02 06 10 | 01 13 11 05 07 | 03 04 14 09 15 |
# | 05 15 09 13 11 | 14 03 12 04 10 | 02 07 06 08 01 |
# | 14 04 01 07 03 | 09 06 02 08 15 | 05 11 13 10 12 |
# +----------------+----------------+----------------+
# | 11 09 03 12 13 | 10 15 14 07 02 | 04 05 01 06 08 |
# | 15 06 14 01 04 | 11 08 05 03 09 | 07 12 02 13 10 |
# | 02 08 05 10 07 | 04 12 13 01 06 | 09 15 03 14 11 |
# +----------------+----------------+----------------+
```

### Seeds

Problems can be generated with a certain seed.

```py
# Generates a 3x2 puzzle with a given seed
Sudoku(3, 2, seed=100).solve().show()
# +-------+-------+
# | 5 6 3 | 1 2 4 |
# | 2 1 4 | 5 3 6 |
# +-------+-------+
# | 1 5 2 | 6 4 3 |
# | 3 4 6 | 2 5 1 |
# +-------+-------+
# | 6 3 5 | 4 1 2 |
# | 4 2 1 | 3 6 5 |
# +-------+-------+

```

### Importing boards

Puzzle boards can also be imported.

```py
board = [
    [0,0,7,0,4,0,0,0,0],
    [0,0,0,0,0,8,0,0,6],
    [0,4,1,0,0,0,9,0,0],
    [0,0,0,0,0,0,1,7,0],
    [0,0,0,0,0,6,0,0,0],
    [0,0,8,7,0,0,2,0,0],
    [3,0,0,0,0,0,0,0,0],
    [0,0,0,1,2,0,0,0,0],
    [8,6,0,0,7,0,0,0,5]
]
puzzle = Sudoku(3, 3, board=board)

print(puzzle)
# ---------------------------
# 9x9 (3x3) SUDOKU PUZZLE
# Difficulty: 0.74
# ---------------------------
# +-------+-------+-------+
# |     7 |   4   |       |
# |       |     8 |     6 |
# |   4 1 |       | 9     |
# +-------+-------+-------+
# |       |       | 1 7   |
# |       |     6 |       |
# |     8 | 7     | 2     |
# +-------+-------+-------+
# | 3     |       |       |
# |       | 1 2   |       |
# | 8 6   |   7 0 |     5 |
# +-------+-------+-------+

puzzle.solve().show_full()
# ---------------------------
# 9x9 (3x3) SUDOKU PUZZLE
# Difficulty: SOLVED
# ---------------------------
# +-------+-------+-------+
# | 9 8 7 | 6 4 2 | 5 3 1 |
# | 2 3 5 | 9 1 8 | 7 4 6 |
# | 6 4 1 | 5 3 7 | 9 8 2 |
# +-------+-------+-------+
# | 5 2 6 | 3 8 4 | 1 7 9 |
# | 1 7 3 | 2 9 6 | 8 5 4 |
# | 4 9 8 | 7 5 1 | 2 6 3 |
# +-------+-------+-------+
# | 3 1 9 | 8 6 5 | 4 2 7 |
# | 7 5 4 | 1 2 3 | 6 9 8 |
# | 8 6 2 | 4 7 9 | 3 1 5 |
# +-------+-------+-------+
```

### Invalid boards

Invalid boards give errors when attempted to be solved.

```py
board = [
    [0,0,7,0,4,0,0,0,0],
    [0,0,0,0,0,8,0,0,6],
    [0,4,1,0,0,0,9,0,0],
    [0,0,0,0,0,0,1,7,0],
    [0,0,0,0,0,6,0,0,0],
    [0,0,8,7,0,0,2,0,0],
    [3,0,0,0,0,0,0,0,0],
    [0,0,0,1,2,0,0,0,0],
    [8,6,0,0,7,6,0,0,5]
]
puzzle = Sudoku(3, 3, board=board)

puzzle.show_full()
# ---------------------------
# 9x9 (3x3) SUDOKU PUZZLE
# Difficulty: 0.74
# ---------------------------
# +-------+-------+-------+
# |     7 |   4   |       |
# |       |     8 |     6 |
# |   4 1 |       | 9     |
# +-------+-------+-------+
# |       |       | 1 7   |
# |       |     6 |       |
# |     8 | 7     | 2     |
# +-------+-------+-------+
# | 3     |       |       |
# |       | 1 2   |       |
# | 8 6   |   7 6 |     5 |
# +-------+-------+-------+

puzzle.solve().show_full()
# ---------------------------
# 9x9 (3x3) SUDOKU PUZZLE
# Difficulty: INVALID PUZZLE (GIVEN PUZZLE HAS NO SOLUTION)
# ---------------------------
# +-------+-------+-------+
# |       |       |       |
# |       |       |       |
# |       |       |       |
# +-------+-------+-------+
# |       |       |       |
# |       |       |       |
# |       |       |       |
# +-------+-------+-------+
# |       |       |       |
# |       |       |       |
# |       |       |       |
# +-------+-------+-------+
```

If you wish to raise an `UnsolvableSudoku` error when the board is invalid pass a `raising=True` parameter:

```py
puzzle.solve(raising=True)
```
