3 Replies Latest reply on Sep 6, 2017 3:48 AM by Anthony Tuininga-Oracle

    ORA: 12154 error while connecting to Oracle 11g database using python 3.6

      import cx_Oracle
      print('connection start')
      db_connection = cx_Oracle.connect("jdbc:oracle:thin:@(DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = <Host1>)(PORT = <port_number>)) (ADDRESS = (PROTOCOL = TCP)(HOST = <Host2>)(PORT = <port_number>)) (FAILOVER=true)(LOAD_BALANCE=true) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = <service_name>) (FAILOVER_MODE=(TYPE=SELECT)(METHOD=BASIC)(RETRIES=180)(DELAY=5))))", "<username>", "<password>")
      print('connection successful')


      I'm trying to connect to Oracle 11g database using the above python 3.6 code. However, I'm encountering the following error.


      DatabaseError: ORA-12154: TNS:could not resolve the connect identifier specified


      I'm able to successfully connect to same oracle 11g database by using Oracle-SQL-Developer version 17 (with the same connection string).

      So, I'm wondering if there is any issue with my code or does cx_Oracle needs supporting drivers etc. Any help would be much appreciated.