AI Dev Tool: The Wow signal was

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Preview Code

```python
# AI Dev Tool: PostgreSQL Vector Search Extension for Health Risk Assessment
#============================================================

import os
import psycopg2
from psycopg2 import Error
from typing import List, Dict

# Define a function to create a PostgreSQL database connection
def create_connection(host: str, database: str, user: str, password: str) -> psycopg2.connection:
    """
    Create a PostgreSQL database connection.

    Args:
    - host (str): The host IP address or hostname.
    - database (str): The database name.
    - user (str): The username to use for the connection.
    - password (str): The password to use for the connection.

    Returns:
    - connection (psycopg2.connection): The PostgreSQL database connection.
    """
    try:
        connection = psycopg2.connect(
# ... full runnable version includes tests & documentation