Christopher Juckins

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python_virtual_environments [2023/04/28 11:56] – juckinspython_virtual_environments [2023/08/10 11:34] – juckins
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 ==== Python Virtual Environments ==== ==== Python Virtual Environments ====
  
-[[https://towardsdatascience.com/a-guide-to-conda-environments-bc6180fc533#7d04|Overview to conda environments]]\\ +[[https://towardsdatascience.com/a-guide-to-conda-environments-bc6180fc533#7d04|Overview to conda environments]]
-Crons under conda [[https://stackoverflow.com/questions/36365801/run-a-crontab-job-using-an-anaconda-env|solution 1]] and [[https://askubuntu.com/questions/1341422/how-to-run-my-python-script-with-anaconda-environment-in-crontab|solution2]]+
  
 __Installing miniconda__ __Installing miniconda__
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   * (Accept license agreement and all the suggested default choices)   * (Accept license agreement and all the suggested default choices)
 +  * Note that if you do not want conda's base environment to be activated upon startup, run the following:
  
-  ~/miniconda3/bin/conda create -n testenv -c conda-forge time numpy requests pygrib netCDF4 scipy+  conda config --set auto_activate_base false 
 + 
 +Now try creating a test conda environment: 
 + 
 +  cd ~/miniconda3/envs 
 +  ~/miniconda3/bin/conda create -n testenv2 python=3.11.4 -c conda-forge time numpy requests pygrib netCDF4 scipy
   ~/miniconda3/bin/conda init bash   ~/miniconda3/bin/conda init bash
  
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   conda deactivate   conda deactivate
      
-Other useful commmands: +Other useful commmands (see https://www.python.org/downloads/ for specific python versions) : 
-  conda create -n testenv2 python=3.11.3 (with specific version of python)+  conda create -n testenv2 python=3.11.3
   conda activate testenv2   conda activate testenv2
      
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   conda remove --name myenv --all (remove a conda environment)   conda remove --name myenv --all (remove a conda environment)
 +
 +__Running a cron under conda (is this correct?)__
 +  21 15 * * * conda activate testenv2; /path/to/script.py > /tmp/output.txt (just call the correct version of python in first line of the script)
  
 Questions/Tests: Questions/Tests:
   * Create a conda test env with specific version of python   * Create a conda test env with specific version of python
   * Run a script using that new test environment   * Run a script using that new test environment
 +    * Update the first line to point to the correct version of python
 +  * Run cron under conda
 +    * If you update the first line in the script to point to desired conda version of python, then no need to activate the conda env (?)
  
-__Setting up a python virtual environment__+__Using venv to set up a python virtual environment__
  
 <color #ed1c24>Note: This method __does not__ allow for running a different version of python that is natively installed on the system.</color> <color #ed1c24>Note: This method __does not__ allow for running a different version of python that is natively installed on the system.</color>
python_virtual_environments.txt · Last modified: 2023/08/10 11:35 by juckins