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python_virtual_environments

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python_virtual_environments [2023/04/28 15:22] – juckinspython_virtual_environments [2023/08/10 11:35] (current) – 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_3.11.4 -c conda-forge time numpy requests pygrib netCDF4 scipy python=3.11.4
   ~/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__ +__Running a cron under conda (is this correct?)__ 
-  21 15 * * * conda activate testenv2; /path/to/script.py > /tmp/output.txt+  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:
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     * Update the first line to point to the correct version of python     * Update the first line to point to the correct version of python
   * Run cron under conda   * 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 (?)
  
 __Using venv to set up a python virtual environment__ __Using venv to set up a python virtual environment__
python_virtual_environments.1682709771.txt.gz · Last modified: by juckins