The scripting language Python is installed on all the interactive and computing platform at Computing Center. You can find more information about Python on the official site or by typing:
% man python % python -h
You have the possibility to use Python in a script file. In this case, it is better to use the
.py suffix. Your file should contain as the first line:
Your file should also have the “executable” Unix characteristic because Python is an interpreted language. You should not generated an binary executable in the sense of programming languages as C, C++ or Fortran.
To load Python environment:
% ccenv python <version>
To list the available versions:
% ccenv python --list
You have also the option of installing locally the python packages you need without administrator rights on the servers. To do so, please follow the procedure below:
% ccenv python 3.6.7 % python -m venv --system-site-packages "my_new_env" % source "my_new_env"/bin/activate (my_new_env) % python -m pip install --user my_module
The first command loads the Python 3.3 environment required for using
venv (available since version 3.3).
The following command is used to create an “environment” from the given directory
the directory in which the new Python packages will be installed and configured.
The third command tells the system to use this environment. The last command requests Python via the
pip module to install the new module
You can then see the installed package:
(my_new_env) % pip list | grep my_module (my_new_env) % pip show my_module
To exit the virtual environment, run the command:
(my_new_env) % deactivate