import logging

import json

# Configure logging

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

def extend_metadata(data, metadata_override=None):

"""

Extends existing metadata for a given data object with optional overrides.

Args:

data (dict): The data object to extend metadata for.

metadata_override (dict, optional): A dictionary of metadata to override. Defaults to None.

Returns:

dict: The data object with extended metadata.

"""

metadata = data.get('metadata', {}) # Get existing metadata, default to empty dict

if metadata_override:

metadata.update(metadata_override) # Update existing metadata with overrides

# Add default metadata if it doesn't exist

if 'created_at' not in metadata:

metadata['created_at'] = datetime.now().isoformat()

logging.info(f"Added default metadata: created_at = {metadata['created_at']}")

if 'updated_at' not in metadata:

metadata['updated_at'] = datetime.now().isoformat()

logging.info(f"Added default metadata: updated_at = {metadata['updated_at']}")

if 'source' not in metadata:

metadata['source'] = 'internal_tool'

logging.info(f"Added default metadata: source = internal_tool")

# Optionally add more default metadata fields.

data['metadata'] = metadata # Update the data with the extended metadata

logging.info(f"Extended metadata for data: {data}")

return data

from datetime import datetime

if __name__ == '__main__':

# Example Usage

test_data = {'id': 123, 'value': 'test'}

override_metadata = {'status': 'active', 'version': '1.0'}

extended_data = extend_metadata(test_data, override_metadata)

print(json.dumps(extended_data, indent=2))

extended_data_no_override = extend_metadata(test_data)

print(json.dumps(extended_data_no_override, indent=2))