How to install 3rd party module for postgres pl/python?

Question

I need to import a 3rd party module inside my pl/python function. It seems pl/python uses an internal python that does not have any 3rd party modules.

I get this kin

Answer 1

For me, it was about knowing which version Python Postgres was looking at and then installing to the /local/lib directory and NOT .local directory which is not recognised in Postgres.

In Postgres, created this function to identify the Python version it was using: .

CREATE OR REPLACE FUNCTION python_version()
    RETURNS pg_catalog.text AS $BODY$

    import sys
    plpy.info(sys.version)    
    return 'finish'
    $BODY$
LANGUAGE plpython3u VOLATILE SECURITY DEFINER

Execute function using the following:

select python_version()

In Python:

import sys
sys.version

Both the script and Python said: INFO: 3.7.3 (default, Aug 20 2019, 17:04:43)

pip3 install placed the library into this directory: /home/username/.local/lib/python3.7/site-packages

To make the package available to ALL users (including Postgres). I used umask:

sudo su
cd ~
umask 022
pip3 install 

NOTE: The package installs in: /usr/local/lib# cd python3.7/dist-packages NOT in /usr/lib/python3/dist-packages#