How to fix: cx_Oracle.DatabaseError: DPI-1047: Cannot locate a 64-bit Oracle Client library - Python

Question

I am establishing a connection to oracle 11g which is in a remote server using cx_oracle 7 with python 3.6.7. my OS in Ubuntu 18.04

I have installed oracle instant c

Answer 1

I was facing the exact same problem. This is what worked for me:

• First, I downloaded the Oracle Basic zip file. In my case, I got the 64-bit version.
• After that, I unzipped it in an opt directory. I had to use sudo in my system

    $ sudo mkdir -p /opt/oracle  

    $ cd /opt/oracle  

    $ sudo unzip /opt/oracle/instantclient-basic-linux.x64-19.8.0.0.0dbru.zip  

• Then I installed libaio1. Note that I am working with Ubuntu

    $ sudo apt-get install libaio1

• Finally, I added the path to the external variable LD_LIBRARY_PATH

    $ vim ~/.bashrc  

• And added this line to the .bashrc file

    export LD_LIBRARY_PATH=/opt/oracle/instantclient_19_8:$LD_LIBRARY_PATH  

• After saving the .bashrc file, I sourced it:

    $ source ~/.bashrc

Then my Python script worked nicely again.

See also the cx_oracle documentation