#!/usr/bin/python
import psycopg2

def connect_db(db_settings):
    conn = None
    print("Connecting to the PostgreSQL database...")
    try:
        conn = psycopg2.connect(**db_settings)
        print("Connection success")
    except (Exception, psycopg2.DatabaseError) as error:
        print(error)
    return conn

def close_db(conn):
    if conn is not None:
        conn.close()
        print("Connection closed")