Sudoku Parser

Create a class Sudoku that takes a string as an argument. The string will contain the numbers of a regular 9x9 sudoku board left to right and top to bottom, with zeros filling up the empty cells.

Attributes

An instance of the class Sudoku will have one attribute:

• board: a list representing the board, with sublits for each row, with the numbers as integers. Empty cell represented with 0.

Methods

An instance of the class Sudoku wil have three methods:

• get_row(n): will return the row in position n.
• get_col(n): will return the column in position n.
• get_sqr([n, m]): will return the square in position n if only one argument is given, and the square to which the cell in position (n, m) belongs to if two arguments are given.

Example

game = Sudoku("417950030000000700060007000050009106800600000000003400900005000000430000200701580")

game.board ➞ [
  [4, 1, 7, 9, 5, 0, 0, 3, 0],
  [0, 0, 0, 0, 0, 0, 7, 0, 0],
  [0, 6, 0, 0, 0, 7, 0, 0, 0],
  [0, 5, 0, 0, 0, 9, 1, 0, 6],
  [8, 0, 0, 6, 0, 0, 0, 0, 0],
  [0, 0, 0, 0, 0, 3, 4, 0, 0],
  [9, 0, 0, 0, 0, 5, 0, 0, 0],
  [0, 0, 0, 4, 3, 0, 0, 0, 0],
  [2, 0, 0, 7, 0, 1, 5, 8, 0]
]

game.get_row(0) ➞ [4, 1, 7, 9, 5, 0, 0, 3, 0]
game.get_col(8) ➞ [0, 0, 0, 6, 0, 0, 0, 0, 0]
game.get_sqr(1) ➞ [9, 5, 0, 0, 0, 0, 0, 0, 7]
game.get_sqr(1, 8) ➞ [0, 3, 0, 7, 0, 0, 0, 0, 0]
game.get_sqr(8, 3) ➞ [0, 0, 5, 4, 3, 0, 7, 0, 1]

Notes

• All positions are indexed to 0.
• All orders are assigned left to right and top to bottom.