Solution Review: Sudoku

def generate_grid(n_rows, n_cols):
  row = [0] * n_cols
  grid = [row[:] for _ in range(n_rows)]
  # 2 more possible ways of doing the same.
  # grid = [row.copy() for _ in range(n_rows)]
  # grid = [[0] * n_cols for _ in range(n_rows)]
  return grid
def assign(grid, row, col, value):
  grid[row][col] = value
  return grid
rows, cols = 9, 9
sudoku = generate_grid(rows, cols)
print(assign(sudoku, 1, 0, 9))