Cannot import easysnmp: ImportError: libnetsnmp.so.30

[Calab]

I'm trying to use easysnmp in a virtual environment, but get an error when I import it:

Output:
(venv) snorton@app7 /fastapi/sv $ python3
Python 3.7.11 (default, Dec 20 2022, 10:51:25)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-44)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import easysnmp
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/fastapi/sv/venv/lib/python3.7/site-packages/easysnmp/__init__.py", line 1, in <module>
    from .easy import (  # noqa
  File "/fastapi/sv/venv/lib/python3.7/site-packages/easysnmp/easy.py", line 3, in <module>
    from .session import Session
  File "/fastapi/sv/venv/lib/python3.7/site-packages/easysnmp/session.py", line 9, in <module>
    from . import interface
ImportError: libnetsnmp.so.30: cannot open shared object file: No such file or directory
>>>
----------------------------------------------------------------------------
(venv) snorton@app7 /fastapi/sv $ sudo find / -name libnetsnmp.so*
/usr/local/lib/libnetsnmp.so
/usr/local/lib/libnetsnmp.so.30
/usr/local/lib/libnetsnmp.so.30.0.3
/usr/lib64/libnetsnmp.so
/usr/lib64/libnetsnmp.so.31.0.2
/usr/lib64/libnetsnmp.so.31
---------------------------------------------------------------------------

Any idea why, and how to fix it?

[Axel_Erfurt]

is /usr/local/lib/ in PATH ?

echo $PATH

[Calab]

is /usr/local/lib/ in PATH ?

echo $PATH

$ echo $PATH
/fastapi/sv/venv/bin:/usr/local/openssl/bin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/home/snorton/bin:/home/Tools

Looks like it's not. How do I fix this?

I should note that this script will be run by multiple users, including as a cron job, so I can't just add it to my .bash_profile

[Calab]

Looks like it's not. How do I fix this?

This seems to have fixed it... it that all that was needed or is this something that will always need to be run?

Output:
sudo ldconfig /usr/local/lib

[Gribouillis]

It could be the variable LD_LIBRARY_PATH