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```python
# AI Dev Tool: PostgreSQL Vector Search Extension Boilerplate
# Description: A production-ready boilerplate for building scalable vector search applications with PostgreSQL
import os
import psycopg2
from psycopg2 import Error
from typing import List, Dict
# PostgreSQL connection settings
POSTGRES_HOST = os.environ.get('POSTGRES_HOST', 'localhost')
POSTGRES_DB = os.environ.get('POSTGRES_DB', 'vector_search')
POSTGRES_USER = os.environ.get('POSTGRES_USER', 'postgres')
POSTGRES_PASSWORD = os.environ.get('POSTGRES_PASSWORD', 'postgres')
# Establish a connection to the PostgreSQL database
def connect_to_postgres() -> psycopg2.connection:
"""
Connect to the PostgreSQL database.
Returns:
psycopg2.connection: The established connection.
"""
try:
connection = psycopg2.connect(
# ... full runnable version includes tests & documentation
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