processor.py

from typing import List, Dict


def process_data(data: List[Dict[str, int]]) -> Dict[str, int]:
    """
    Processes a list of dictionaries containing numeric data.

    Args:
        data (List[Dict[str, int]]): A list of dictionaries where each dictionary contains
                                        string keys and integer values.

    Returns:
        Dict[str, int]: A dictionary with summed values for each key.
    """
    result: Dict[str, int] = {}

    for entry in data:
        for key, value in entry.items():
            if key in result:
                result[key] += value
            else:
                result[key] = value

    return result


def main() -> None:
    """
    Main function to demonstrate data processing.
    """
    sample_data: List[Dict[str, int]] = [
        {'a': 1, 'b': 2},
        {'a': 3, 'c': 4},
        {'b': 5, 'c': 6}
    ]
    processed = process_data(sample_data)
    print(processed)


if __name__ == '__main__':
    main()