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Virtual environments

Why use virtual environments

  • A virtual environment is a self-contained folder with its own Python interpreter and libraries. It’s already part of python.
  • It helps keep different projects isolated and organized.
  • Avoids conflicts between project dependencies.
  • Easily replicate environments across machines using requirements.txt or pyproject.toml files
  • Test and run different projects using different versions of the same package.
  • Try out new packages or upgrades without affecting global Python.
  • Keeps your system environment clean and uncluttered.

How to use virtual environments

Create a virtual environment

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python -m venv myvenv

Activate a virtual environment

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myenv\Scripts\activate.bat

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source myenv/bin/activate

Now you’re “inside” the environment

Install packages into the virtual environment

Sometimes it is good to make sure PIP is up to date:

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python -m pip install --upgrade pip

Now, you have an environment where you can install the latest version of emodpy-workflow!!!

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pip install hiv-workflow –extra-index-url=https://packages.idmod.org/api/pypi/pypi-production/simple

Deactivate a virtual environment

When you are done or need to switch to a different project, use the following command to exit the virtual environment:

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deactivate