⚡ Live Sandbox: AI Dev Tool: Sustainable energy without the

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```python
# AI Dev Tool: Sustainable Energy Vector Search
# PostgreSQL Vector Search Extension for Sustainable Energy Data

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

# Define database connection parameters
DB_HOST = os.environ.get('DB_HOST')
DB_NAME = os.environ.get('DB_NAME')
DB_USER = os.environ.get('DB_USER')
DB_PASSWORD = os.environ.get('DB_PASSWORD')

# Define the PostgreSQL Vector Search Extension class
class SustainableEnergyVectorSearch:
    def __init__(self, db_host: str, db_name: str, db_user: str, db_password: str):
        """
        Initialize the PostgreSQL Vector Search Extension.

Args:
        - db_host (str): Database host.
        - db_name (str): Database name.
        - db_user (str): Database user.
        - db_password (str): Database password.
        """
        self.db_host = db_host
        self.db_name = db_name
        self.db_user = db_user
        self.db_password = db_password
        self.conn = None

def connect_to_db(self) -> None:
        """
        Establish a connection to the PostgreSQL database.
        """
        try:
            self.conn = psycopg2

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