2) output of `cat /etc/os-release`:
PRETTY_NAME="Ubuntu 22.04.4 LTS"
NAME="Ubuntu"
VERSION_ID="22.04"
VERSION="22.04.4 LTS (Jammy Jellyfish)"
VERSION_CODENAME=jammy
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=jammy
qef@A:~/SALOME$ python 


PATH:
/home/qef/OpenFOAM/qef-v2306/platforms/linux64GccDPInt64Opt/bin:/home/qef/OpenFOAM/OpenFOAM-v2306/site/2306/platforms/linux64GccDPInt64Opt/bin:/home/qef/OpenFOAM/OpenFOAM-v2306/platforms/linux64GccDPInt64Opt/bin:/home/qef/OpenFOAM/OpenFOAM-v2306/bin:/home/qef/OpenFOAM/OpenFOAM-v2306/wmake:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin


LD_LIBRARY_PATH
/home/qef/OpenFOAM/qef-v2306/platforms/linux64GccDPInt64Opt/lib:/home/qef/OpenFOAM/OpenFOAM-v2306/site/2306/platforms/linux64GccDPInt64Opt/lib:/home/qef/OpenFOAM/OpenFOAM-v2306/platforms/linux64GccDPInt64Opt/lib/sys-openmpi:/home/qef/OpenFOAM/OpenFOAM-v2306/platforms/linux64GccDPInt64Opt/lib:/home/qef/OpenFOAM/OpenFOAM-v2306/ThirdParty/platforms/linux64Gcc/fftw-3.3.10/lib64:/home/qef/OpenFOAM/OpenFOAM-v2306/ThirdParty/platforms/linux64Gcc/CGAL-4.14.3/lib64:/home/qef/OpenFOAM/OpenFOAM-v2306/ThirdParty/platforms/linux64Gcc/boost_1_74_0/lib64:/usr/lib/x86_64-linux-gnu/openmpi/lib:/home/qef/OpenFOAM/OpenFOAM-v2306/platforms/linux64GccDPInt64Opt/lib/dummy

if I type echo $PYTHONPATH
nothing is output on terminal , how can I find it?

python --version
Python 3.10.12