Using Python

Example

The following example shows how to use Python:

$ module switch env env/2023Q4-gcc-openmpi
$ python3 -m venv $USW/myvenv
$ source $USW/myvenv/bin/activate
(myvenv) $ pip3 install ...

Remark: Typically one would switch to the latest pgksrc Module. At the time of writing that was env/2023Q4-gcc-openmpi.

Selecting a particular version of Python

By switching to a pgksrc Module typically several version of Python become available, for example:

$ module switch env env/2023Q4-gcc-openmpi
$ python2 --version
Python 2.7.18
$ python3 --version
Python 3.11.7
$ python3.10 --version
Python 3.10.13

But there is no python command:

$ python --version
-bash: python: command not found

For convenience there are Modules called pythonversion which make a particular version of Python available under the name python, for example:

$ module switch env env/2023Q4-gcc-openmpi
$ module load pythonversion/3.10
pythonversion: /sw/env/gcc-13.2.0_openmpi-4.1.6/pkgsrc/2023Q4/bin/python3.10
module: loaded pythonversion/3.10
$ python --version
Python 3.10.13