code: def check_params(num_rows, num_cols, padding):
      
  
      num_rows = check_int(num_rows, 'num_rows', min_value=1)
      num_cols = check_int(num_cols, 'num_cols', min_value=1)
      padding = check_int(padding, 'padding', min_value=0)
  
      return num_rows, num_cols, padding
docs: Validation and typcasting