# def iter_and_append_from_csv(csvfile):
#     """
#     Read and iterate over a CSV file.
#     Args:
#         csvfile (file): A file object representing the CSV file to read.
    
#     Yields:
#         list: A row from the CSV file as a list of strings.
#     """
#     csvreader = csv.reader(csvfile)
#     for row in csvreader:
#         yield row

# def _read_csv_data(filename: str, row_indices: List[int], col_indices: List[int]) -> List[List[str]]:
#     """
#     Helper function to read and extract specific rows and columns from a CSV file.
    
#     Args:
#         filename (str): Path to the CSV file.
#         row_indices (List[int]): List of row indices to extract.
#         col_indices (List[int]): List of column indices to extract.
    
#     Returns:
#         List[List[str]]: A list of rows, where each row is a list of values at the specified column indices.
#     """
#     try:
#         with open(filename, 'r', encoding='utf-8') as csvfile:
#             csvfile_data = list(iter_and_append_from_csv(csvfile))
#             return [[csvfile_data[row][col] for col in col_indices] for row in row_indices]
#     except FileNotFoundError as e:
#         print(e)
#         return []