To set environment variable for location of optimiser (cplex etc). https://conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#macos-and-linux
Locate the directory for the conda environment in your terminal window by running in the terminal echo $CONDA_PREFIX.
Enter that directory and create these subdirectories and files: cd $CONDA_PREFIX mkdir -p ./etc/conda/activate.d mkdir -p ./etc/conda/deactivate.d touch ./etc/conda/activate.d/env_vars.sh touch ./etc/conda/deactivate.d/env_vars.sh
Edit ./etc/conda/activate.d/env_vars.sh as follows: #!/bin/sh export OPTIMISER_ENGINE='cplex' export OPTIMISER_ENGINE_EXECUTABLE=/opt/ibm/ILOG/CPLEX_Studio128/cplex/bin/x86-64_linux/cplex
Edit ./etc/conda/deactivate.d/env_vars.sh as follows: #!/bin/sh unset OPTIMISER_ENGINE unset OPTIMISER_ENGINE_EXECUTABLE
When you run conda activate analytics, the environment variables MY_KEY and MY_FILE are set to the values you wrote into the file. When you run conda deactivate, those variables are erased.