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CommunityData:Hyak software installation
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=== Python Packages === Our setup on Mox provides the Anaconda python distribution. Using an anaconda python distribution has important implications for how you install packages. While in normal python, you would install python packages using `pip`, when you use an anaconda distribution you should use <code>conda</code> to install packages. Conda also has some fancy features like virtual environments for using different versions of python or different versions of packages in different projects. The problem with using conda is that it does not include all the packages you might want to use. If you want to install a python package that is missing from conda, you can use pip. ''Importantly, you should prefer to install software using conda over pip.'' Details on both are here: * [https://conda.io/docs/ Conda Documentation] * [https://pip.pypa.io/en/stable/ Pip Documentation] It's often a good idea to create new environments for installing software you will use in each project. This way you can use the latest and greatest versions of packages, but you'll still be able to run code in your old projects. To create a new conda environment: <syntaxhighlight lang='bash'> $ conda create -n my_root </syntaxhighlight> Then add the following to your .bashrc to use this environment automatically by default: <syntaxhighlight lang='bash'> if [ -z $(conda info --env | grep my_root | grep \*) ]; then source activate my_root fi </syntaxhighlight> Conda doesn't like it when you try to activate an environment that is already active. Conda modifies your prompt in a possibly annoying way. To disable this behavior run the command: <syntaxhighlight lang='bash'> $ conda config --set changeps1 False </syntaxhighlight>
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