Using Python and Pip with Environment Modules

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Several versions of Python are available using Environment Modules, in addition to the default package versions. You can determine what version is available by appending the --version switch to your python command.

NOTE: For AI.Panther users, the python3 command is only supported.

Example (version numbers will be different on each system):

List current modules.

~ $ module list

No Modulefiles Currently Loaded.

Show current Python3 versions. Since no Python modules are loaded, they are the OS provided versions.
```
 ~ $ python3 --version

 Python 3.5.1 
```

List available Python modules. Default module is indicated with (default).

 ~ $ module avail python

 ------------------------- /opt/software/modules/ --------------------------

 python/3.4.2 python/3.5.1(default)

Load default Python module.
```
 ~ $ module load python
```
Show Python and Python3 versions. Since only the Python 3.5.1 module was loaded, it was the only version that changed.
```
 ~ $ python3 --version

 Python 3.5.1 
```
Unload Python module.
```
 ~ $ module unload python
```

Pip with Environment Modules

Pip can also be used with python to install python packages.

As with Python, pip has different commands for different versions:

pip, pip2, and pip2.7 are not supported and do not use.
pip3 - to install OS maintained Python 3 pip packages.

Pip examples (version numbers will be different on each system):

List current modules.

 ~ $ module list

 No Modulefiles Currently Loaded.

Display pip3 version. With no Python modules loaded, they use the OS provided version.
```
 ~ $ pip3 --version

 pip 9.0.1 from /usr/lib/python3.4/site-packages (python 3.4) 
```
Load Python 3.4.2 specific module.
```
 ~ $ module load python/3.4.2
```

Display pip3 versions. Now they show the version from the loaded Python 3.4.2 module.

 ~ $ pip3 --version

 pip 9.0.1 from /opt/software/python/python-3.4.2/lib/python3.4/site-packages (python 3.4)

Unload Python 3.4.2
```
 ~ $ module unload python/3.4.2
```
Load the default python module, which currently is Python 3.5.1.
```
 ~ $ module load python
```

Display the pip3 versions. Now they show the version from the loaded 3.5.1 Python module.

 ~ $ pip3 --version

 pip 9.0.1 from /opt/software/python/python-3.5.1/lib/python3.5/site-packages (python 3.5)

Installing a pip module into your userspace

NOTE: Be sure to specify the version of Pip you want to use.

 ~ $ pip3 install --user <pip_module>

 Collecting <pip_module>

   Downloading <pip_module>.whl (43.1MB)

     100% |████████████████████████████████| 43.1MB 12kB/s