import argparse

import logging

def paginate_cli_args(parser, args, results_generator, page_size=10):

"""

Paginates results from a generator based on CLI arguments.

Args:

parser: argparse.ArgumentParser object.

args: argparse.Namespace object containing CLI arguments.

results_generator: A generator function that yields results.

page_size: The number of results per page.

"""

# Configure logging

logging.basicConfig(level=logging.INFO, format='%(asctime)s - %(levelname)s - %(message)s')

try:

page = args.page if hasattr(args, 'page') else 1 # Default to page 1 if not specified

total_results = sum(1 for _ in results_generator) #Count total results

if total_results == 0:

logging.info("No results found.")

return

start = (page - 1) * page_size

end = start + page_size

for i, result in enumerate(results_generator):

if i >= start and i < end:

logging.debug(f"Processing result {i+1}/{total_results}")

yield result

elif i >= end:

logging.info(f"Finished processing page {page}.")

break #Stop if end of results is reached

except Exception as e:

logging.error(f"An error occurred during pagination: {e}")

raise

if __name__ == '__main__':

parser = argparse.ArgumentParser(description="Paginate CLI arguments.")

parser.add_argument("--page", type=int, help="Page number to retrieve.")

# Example results generator

def example_results(n):

for i in range(n):

yield f"Result {i+1}"

args = parser.parse_args()

try:

paginated_results = list(paginate_cli_args(parser, args, example_results(25), page_size=5)) #Example Usage

for result in paginated_results:

print(result)

except Exception as e:

print(f"Error: {e}")