| import ast | |
| def parse_string_list(input_data): | |
| if isinstance(input_data, list): | |
| # If input is already a list, validate its contents | |
| if all(isinstance(item, str) for item in input_data): | |
| return input_data | |
| else: | |
| print("Error: All items in the list must be strings") | |
| return None | |
| elif isinstance(input_data, str): | |
| try: | |
| # Use ast.literal_eval to safely evaluate the string | |
| parsed_data = ast.literal_eval(input_data) | |
| # Check if the result is a list | |
| if not isinstance(parsed_data, list): | |
| raise ValueError("Input is not a valid list") | |
| # Check if all elements are strings | |
| if not all(isinstance(item, str) for item in parsed_data): | |
| raise ValueError("All items in the list must be strings") | |
| return parsed_data | |
| except (ValueError, SyntaxError) as e: | |
| # Handle parsing errors | |
| print(f"Error parsing input: {e}") | |
| return None | |
| else: | |
| print("Error: Input must be a string or a list") | |
| return None | |