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linux_python_tips [2019/08/08 17:37] (current)
ktm5j created
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 +====== Python Tips ======
  
 +To use python on CS Linux servers, you will first need to load either the ''​%%python%%''​ or ''​%%anaconda3%%''​ modules. ​ For more information about software modules, see the main article [[linux_environment_modules|Environment Modules]] or [[linux_available_modules|Available Modules]] for a list of available software.
 +
 +Load python3.6 by running:
 +
 +<​code>​
 +ktm5j@portal01 ~ $ module load python
 +ktm5j@portal01 ~ $ which python
 +/​sw/​centos/​python/​current/​bin/​python ​      <​-- We now have python available
 +</​code>​
 +
 +You will not be able to use ''​%%pip%%''​ with this installation,​ unless you use ''​%%--user%%''​ flag or a ''​%%virtualenv%%''​. ​ Package install requests can be sent to cshelpdesk@virginia.edu and are usually installed same day as the request.
 +
 +===== Virtualenvs =====
 +
 +If you need to install your own packages virtualenvs may be useful. ​ You can create your own python environment,​ in which you can install packages via ''​%%pip%%''​. ​ Here is how the process works:
 +
 +First load the python module and create the env:
 +<​code>​
 +ktm5j@portal01 ~/​src/​pyenvs $ module load python
 +ktm5j@portal01 ~/​src/​pyenvs $ virtualenv local-env
 +Using base prefix '/​sw/​centos/​python/​3.6.2'​
 +New python executable in /​u/​ktm5j/​src/​pyenvs/​local-env/​bin/​python3.6
 +Also creating executable in /​u/​ktm5j/​src/​pyenvs/​local-env/​bin/​python
 +Installing setuptools, pip, wheel...done.
 +</​code>​
 +
 +Next, unload the python module and source the env activation script:
 +
 +<​code>​
 +ktm5j@portal01 ~/​src/​pyenvs $ module unload python
 +ktm5j@portal01 ~/​src/​pyenvs $ source local-env/​bin/​activate
 +(local-env) ktm5j@portal01 ~/​src/​pyenvs $ which python pip
 +~/​src/​pyenvs/​local-env/​bin/​python
 +~/​src/​pyenvs/​local-env/​bin/​pip ​                    <​-- python and pip bins now in env
 +</​code>​
 +
 +You are now able to install packages via pip:
 +
 +<​code>​
 +(local-env) ktm5j@portal01 ~/​src/​pyenvs $ pip install fabric
 +Collecting fabric
 +  Downloading https://​files.pythonhosted.org/​packages/​d7/​cb/​47feeb00dae857f0fbd1153a61e902e54ed77ccdc578b371a514a3959a19/​fabric-2.5.0-py2.py3-none-any.whl (51kB)
 +     ​|████████████████████████████████| 61kB 3.4MB/​s ​
 +Collecting paramiko>​=2.4 (from fabric)
 +  Using cached https://​files.pythonhosted.org/​packages/​4b/​80/​74dace9e48b0ef923633dfb5e48798f58a168e4734bca8ecfaf839ba051a/​paramiko-2.6.0-py2.py3-none-any.whl
 +Collecting invoke<​2.0,>​=1.3 (from fabric)
 +...
 +</​code>​
  • linux_python_tips.txt
  • Last modified: 2019/08/08 17:37
  • by ktm5j