Goal: Understand how to load modules, reset your environment by purging, and potential dependency issues.

1 Setup Python environment
2 What’s happened to the PATH environment variable?
3 What’s Happening to My Environment?
4 Can we use the R language?
5 Can we also use the Python language?
6 Load Another Compiler:
7 But R is still in my Module List?
8 Remember:
9 Exercises:
10 Exercises: Answers:

Setup Python environment

Let’s set up an environment to enable us to run Python scripts:

[]$ module purge
[]$ module load gcc/14.2.0
[]$ module load python/3.12.0
[]$ python --version

Can we combine the two module load commands into a single line?

What is the difference, what happens, when we try the following two methods:

[]$ module purge
[]$ module load python/3.12.0 gcc/14.2.0
vs
[]$ module purge
[]$ module load gcc/14.2.0 python/3.12.0

Order matters!

Dependencies must be loaded first, so must be listed first, from left to right.

What’s happened to the PATH environment variable?

[]$ module purge
[]$ echo $PATH
/apps/s/arcc/1.0/bin:/apps/s/slurm/latest/bin:
/home/<username>/.local/bin:/home/<username>/bin:
/usr/share/Modules/bin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/sbin

[]$ which python
/usr/bin/python

What’s Happening to My Environment?

Can we use the R language?

Can we use the R language? Fixed

Can we also use the Python language?

Load Another Compiler:

But R is still in my Module List?

Remember:

Exercises:

Exercises: Answers:

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