Challenge 1: Sudoku

Let’s get on with the first coding challenge.

Problem statement

The problem has two tasks:

1. First, you must initialize a $9 \times 9$ grid representing a Sudoku board with all zeros.
2. Second, you must implement the assign() function, which takes the following parameters:
   • grid: A list of lists.
   • row: An integer indicating a row on the grid.
   • col: An integer indicating a column on the grid.
   • value: Value be assigned.

This function should assign value to the cell identified by row and col in the grid. Make sure that it won’t alter any other values. The function should return an altered grid at the end.

Sample input

# Demonstrating a 3x3 grid, a 9x9 sudoku
# will also have similar inputs based on the dimensions
grid = [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
row = 1
col = 0
value = 9

Sample output

# Output for the assign method for the above sample input
[[0, 0, 0], [9, 0, 0], [0, 0, 0]]