Python Virtual Environments

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It’s common to have multiple Python applications running on your system.

When applications require the same module, at some point you will reach a tricky situation where an app needs a version of a module, and another app a different version of that same module.

To solve this, you use virtual environments.

We’ll use venv. Other tools work similarly, like pipenv.

Create a virtual environment using

python -m venv .venv

in the folder where you want to start the project, or where you already have an existing project.

Then run

source .venv/bin/activate

Use source .venv/bin/ on the Fish shell

Executing the program will activate the Python virtual environment. Depending on your configuration you might also see your terminal prompt change.

Mine changed from

➜ folder


(.venv) ➜ folder

Now running pip will use this virtual environment instead of the global environment.

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