How to connect with redshift in python

import psycopg2
import psycopg2.extras

def redshif_connect(): 
  ####### connection and session creation ##############  
  print("redshif_connect start......")  

  conn = psycopg2.connect(dbname="RS_DB_NAME", host="HOST_NAME", 
                    port="RS_PORT", user="USER_NAME", password="PWD")  

  print('redshif connection variable', conn)  

  self.cursor = conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor)