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calcoloscientifico:userguide:python [16/04/2025 13:05] – [Python] fabio.spatarocalcoloscientifico:userguide:python [27/08/2025 18:13] (versione attuale) – fabio.spataro
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   - python/3.11.5   - python/3.11.5
  
-==== Python virtualenv ====+===== Python virtualenv =====
  
 [[https://virtualenv.pypa.io/en/stable|Virtualenv]] is a tool to create isolated Python environments. [[https://virtualenv.pypa.io/en/stable|Virtualenv]] is a tool to create isolated Python environments.
  
-=== Python 2.7.14 virtualenv ===+==== Python 2.7.14 virtualenv ====
  
-Create a virtual environment for "machine-learning":+Create a virtual environment for ''machine-learning'':
  
 <code> <code>
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 </code> </code>
  
-Activate "machine-learning" virtual environment:+Activate ''machine-learning'' virtual environment:
  
 <code> <code>
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 </code> </code>
  
-Install packages in "machine-learning" virtual environment:+Install packages in ''machine-learning'' virtual environment:
  
 <code> <code>
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 </code> </code>
  
-Deactivate "machine-learning" virtual environment:+Deactivate ''machine-learning'' virtual environment:
  
 <code> <code>
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 </code> </code>
  
-=== Python 3.6.3 virtualenv ===+==== Python 3.6.3 virtualenv ====
  
 Available virtual environments for Python 3.6.3: Available virtual environments for Python 3.6.3:
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   * tensorflow-gpu   * tensorflow-gpu
  
-== Site installation ==+=== Site installation ===
  
-Activate "opencv" virtual environment:+Activate ''opencv'' virtual environment:
  
 <code> <code>
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 ---- ----
  
-Activate "tensorflow" virtual environment:+Activate ''tensorflow'' virtual environment:
  
 <code> <code>
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 ---- ----
  
-Activate "tensorflow-gpu" virtual environment:+Activate ''tensorflow-gpu'' virtual environment:
  
 <code> <code>
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 </code> </code>
  
-== User installation ==+=== User installation ===
  
-Create "opencv" virtual environment (just once):+Create ''opencv'' virtual environment (just once):
  
 <code> <code>
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 </code> </code>
  
-Update "opencv" virtual environment (every time you want to update):+Update ''opencv'' virtual environment (every time you want to update):
  
 <code> <code>
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 </code> </code>
  
-Activate "opencv" virtual environment:+Activate ''opencv'' virtual environment:
  
 <code> <code>
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 ---- ----
  
-Create "tensorflow" virtual environment (just once):+Create ''tensorflow'' virtual environment (just once):
  
 <code> <code>
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 </code> </code>
  
-Update "tensorflow" virtual environment (every time you want to update):+Update ''tensorflow'' virtual environment (every time you want to update):
  
 <code> <code>
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 </code> </code>
  
-Activate "tensorflow" virtual environment:+Activate ''tensorflow'' virtual environment:
  
 <code> <code>
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 ---- ----
  
-Create "tensorflow-gpu" virtual environment (just once):+Create ''tensorflow-gpu'' virtual environment (just once):
  
 <code> <code>
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 </code> </code>
  
-Update "tensorflow-gpu" virtual environment (every time you want to update):+Update ''tensorflow-gpu'' virtual environment (every time you want to update):
  
 <code> <code>
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 </code> </code>
  
-Activate "tensorflow-gpu" virtual environment:+Activate ''tensorflow-gpu'' virtual environment:
  
 <code> <code>
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 ---- ----
 +
 +Deactivate the virtual environment:
 +
 +<code>
 +deactivate
 +</code>
 +
 +==== Python 3.6.8 virtualenv ====
 +
 +=== User installation ===
 +
 +Require a node with ''srun'':
 +
 +<code>
 +srun \
 +    --job-name=srun \
 +    --nodes=1 \
 +    --ntasks-per-node=1 \
 +    --cpus-per-task=1 \
 +    --time=0-01:00:00 \
 +    --mem=1G \
 +    --partition=cpu \
 +    --qos=normal \
 +    --pty \
 +    bash
 +</code>
 +
 +Create ''my_venv_with_jupyter'' virtual environment (just once):
 +
 +<code>
 +mkdir -p "$HOME/local/tools/python/3.6.8/virtualenv/my_venv_with_jupyter"
 +python3 -m venv "$HOME/local/tools/python/3.6.8/virtualenv/my_venv_with_jupyter"
 +source "$HOME/local/tools/python/3.6.8/virtualenv/my_venv_with_jupyter/bin/activate"
 +python3 -m pip install --upgrade pip
 +python3 -m pip install --upgrade jupyter notebook ipyparallel
 +#python3 -m pip install --upgrade other_packages_for_my_project
 +deactivate
 +</code>
 +
 +Update ''my_venv_with_jupyter'' virtual environment (every time you want to update):
 +
 +<code>
 +source "$HOME/local/tools/python/3.6.8/virtualenv/my_venv_with_jupyter/bin/activate"
 +python3 -m pip install --upgrade pip
 +python3 -m pip install --upgrade jupyter notebook ipyparallel
 +#python3 -m pip install --upgrade other_packages_for_my_project
 +deactivate
 +</code>
 +
 +Activate ''my_venv_with_jupyter'' virtual environment:
 +
 +<code>
 +source "$HOME/local/tools/python/3.6.8/virtualenv/my_venv_with_jupyter/bin/activate"
 +</code>
 +
 +Start the ''Jupyter Notebook Server'':
 +
 +<code>
 +hpc-jupyter-notebook
 +</code>
 +
 +Follow the instructions on the screen:
 +
 +<code>
 +Open another shell and run the following command:
 +
 +ssh -N -L 127.0.0.1:*****:wn**.hpc.unipr.it:***** ***.***@login.hpc.unipr.it
 +
 +To access the notebook, open in a browser the URL which starts with
 +    http://127.0.0.1 (last line below)
 +</code>
 +
 +Stop the ''Jupyter Notebook Server'':
 +
 +Press ''CTRL'' + ''C''.
  
 Deactivate the virtual environment: Deactivate the virtual environment:
calcoloscientifico/userguide/python.1744801557.txt.gz · Ultima modifica: da fabio.spataro
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