⚡ Live Sandbox: AI Dev Tool: Half of Europes towns

📝 Editable Code Sandbox

```python
# AI Dev Tool: Smart Village Data Ingestion CLI
# =============================================
# A command-line tool for ingesting and processing data on population decline in European towns and villages.

import argparse
import csv
import json
from typing import Dict, List

def ingest_data(csv_file: str) -> List[Dict]:
    """
    Ingest population data from a CSV file.

Args:
    - csv_file (str): Path to the CSV file containing population data.

Returns:
    - List[Dict]: A list of dictionaries, where each dictionary represents a town or village with its population data.
    """
    data = []
    with open(csv_file, 'r') as file:
        reader = csv.DictReader(file)
        for row in reader:
            data.append({
                'town': row['Town'],
                'village': row['Village'],
                'population_1960': int(row['Population 1960']),
                'population_2020': int(row['Population 2020'])
            })
    return data

def process_data(data: List[Dict]) -> Dict:
    """
    Process the ingested data to calculate population decline.

Args:
    - data (List[Dict]): A list of dictionaries

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