使用 python 为 ORACLE 在 linux 中设置环境变量？

Question

I am using cx_oracle library and have to specify the following using linux

export LD_LIBRARY_PATH=/opt/oracle/12.1.0_64bit/product/12.1.0/client_2/lib export ORACLE_HOME=/opt/oracle/12.1.0_64bit/product/12.1.0/client_2

this makes my code work fine

the issue is this doesn't save across every session so I decided to add it to my script instead like this

os.environ["ORACLE_HOME"] = /opt/oracle/12.1.0_64bit/product/12.1.0/client_2 
os.environ["LD_LIBRARY_PATH"] = /opt/oracle/12.1.0_64bit/product/12.1.0/client_2 

but its not working. I added that line right after my imports so its the first thing ran, but its not changing the variables.

when I echo those two variables after the script they're still both empty.

Answer 1

On Linux, you need to set LD_LIBRARY_PATH before the process (eg Python) starts.

Otherwise you can add the env vars to files like ~/.bashrc, or have a wrapper script like p.sh:

#!/bin/sh

export LD_LIBRARY_PATH=/opt/oracle/12.1.0_64bit/product/12.1.0/client_2/lib 
export ORACLE_HOME=/opt/oracle/12.1.0_64bit/product/12.1.0/client_2
python $@

Do you need the full client? Do you have other Oracle software installed? If no & no, then consider using Oracle Instant Client and using ldconfig so you don't need to set environment variables, see the installation instructions at https://www.oracle.com/database/technologies/instant-client/linux-x86-64-downloads.html#ic_x64_inst