Python

Description

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Python is a programming language that lets you work more quickly and integrate your systems more effectively. You can learn to use Python and see almost immediate gains in productivity and lower maintenance costs. Python version 3 is the current implementation of Python while python2 is a legacy version that will be unsupported after 2020. See the statement about the move of major scientific projects to python3

Python3 vs Python3-Core

The python3 environment module provides a full-featured python3 installation with around 300 installed python3 modules for development and use of python3 applications for research. If you only need the core python3 build to provide a scripting interface for the application you are building see the python3-core environment module.

Required Modules

modules documentation

Serial

• python

System Variables

• HPC_PYTHON_DIR - installation directory

• HPC_PYTHON_BIN - executable directory
• HPC_PYTHON_LIB - library directory

and modifies PYTHONPATH and PYTHONHOME, so you could use them in your scripts.

Additional Information

• After the appropriate environment module is loaded - type "python3" at the command line to open an interactive session.
• To run a python3 script type python3 scriptname.py. If the correct "shebang" line is used at the top of the script E.g.

#!/usr/bin/env python3

then the script can be run directly as scriptname.py if it's in the executable path or as ./scriptname.py if it's in the current directory. The same rules apply to using a python3 script in a batch job script.

You can request installation of additional modules by submitting a request ticket in the Support System. The support request tickets can be used for requesting software installation, finding a solution to a particular problem, or just asking a question.

Matplotlib backend note

If you are trying to use matplotlib and get an error similar to

import _tkinter # If this fails your Python may not be configured for Tk
ImportError: No module named _tkinter

then you should try the following:

import matplotlib
matplotlib.use('Agg')

before importing pyplot from matplotlib.

Available modules

To see all installed modules names load the environment module and run pip3 list or python3 -c "help('modules')" command before submitting a request for a new module installation. Below is a list of modules and versions installed in the default python3 version. Automatically generated list of python modules installed with the Python Package Manager (pip) under the default python version.

Name	Version