Brandon Rozek

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PhD Student @ RPI studying Automated Reasoning in AI and Linux Enthusiast.

Python Virtual Environments

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Dependency management is hard. Luckily with Python there is a program called virtualenv that can help isolate different projects and manage dependencies.


To create a new python 3.7 environment type in the following:

virtualenv --python=python3.7 environment_name

Of course you can replace the python version with whichever version you like. Now to go into the environment do the following:

source environment_name/bin/activate

This now sets up your python interpreter and other utilities to use the installation in the environment_name folder. You can now install python packages using pip and have it only reside in this environment.

To save all currently installed packages into requirements.txt:

pip freeze > requirements.txt

You can then install those packages in a different virtualenv session with:

pip install -r requirements.txt

You can leave the virtualenv session with:

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