1. def create_utility_entries(utility_name, entries):
  2. """
  3. Creates a nested structure of utility entries with defensive checks.
  5. Args:
  6. utility_name (str): The name of the utility.
  7. entries (list): A list of entry dictionaries. Each entry should be a dictionary
  8. with keys like 'id', 'description', 'value', etc.
  10. Returns:
  11. dict: A dictionary representing the utility structure. Returns None if invalid input.
  13. Raises:
  14. TypeError: if utility_name is not a string or entries is not a list.
  15. ValueError: if entries contains elements that are not dictionaries.
  16. """
  18. if not isinstance(utility_name, str):
  19. raise TypeError("utility_name must be a string.")
  20. if not isinstance(entries, list):
  21. raise TypeError("entries must be a list.")
  23. utility_data = {
  24. "name": utility_name,
  25. "entries": []
  26. }
  28. for entry in entries:
  29. if not isinstance(entry, dict):
  30. raise ValueError("All entries in the list must be dictionaries.")
  32. # Defensive check for required keys (customize as needed)
  33. if 'id' not in entry or 'description' not in entry:
  34. print(f"Warning: Skipping entry due to missing 'id' or 'description': {entry}")
  35. continue # Skip this entry
  37. utility_data["entries"].append(entry)
  39. return utility_data
  42. if __name__ == '__main__':
  43. # Example Usage:
  44. try:
  45. utility = create_utility_entries("Local Power", [
  46. {"id": 1, "description": "Electricity Usage", "value": 1200},
  47. {"id": 2, "description": "Water Consumption", "value": 500},
  48. {"id": 3, "description": "Gas Usage", "value": 300},
  49. {"description": "Missing ID", "value": 100} #Example of missing id
  50. ])
  52. if utility:
  53. print(utility)
  54. except (TypeError, ValueError) as e:
  55. print(f"Error: {e}")

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