new_contents: from dburi import parse_db_str
  if __name__ == "__main__":
      print parse_db_str('mysql://buzz:123@localhost/buzz_master?option=open&charset=utf8&table=test')
      print parse_db_str('mysql://buzz:123@localhost/buzz_master')
      print parse_db_str("mongo://127.0.0.1:27017/buzz_master")
      print parse_db_str('redis://127.0.0.1:6379')
      print parse_db_str('elasticsearch://127.0.0.1:9200')
      print parse_db_str('hbase://127.0.0.1:9090/buzz')
      print parse_db_str('memcached://127.0.0.1:11211')
  
subject: Add example.py for test