Snippets
virtualenv

How-to articles, tricks, and solutions about VIRTUALENV

How can I install packages using pip according to the requirements.txt file from a local directory?

To install packages using pip from a local directory, you can use the -r option to specify the path to the requirements.txt file.

python pip virtualenv

How do I update/upgrade pip itself from inside my virtual environment?

To update pip itself from inside your virtual environment, you can use the following command:

python pip virtualenv package-managers upgrade

How to activate virtualenv in Linux?

To activate a virtual environment in Linux, you can use the source command and the path to the activate script that is located in the virtual environment's bin directory.

linux python python-3.x virtualenv python-venv

How to leave/exit/deactivate a Python virtualenv

To leave a Python virtual environment, you can use the deactivate command.

python virtualenv exit virtualenvwrapper

Use different Python version with virtualenv

To use a different Python version with virtualenv, follow these steps:

python virtualenv virtualenvwrapper

Using Python 3 in virtualenv

Here is an example of how you can use Python 3 in a virtual environment using the virtualenv package:

python python-3.x virtualenv

What is the difference between venv, pyvenv, pyenv, virtualenv, virtualenvwrapper, pipenv, etc?

There are many different tools that you can use to create isolated Python environments, each with their own benefits and drawbacks.

python virtualenv virtualenvwrapper pyenv python-venv

What is the easiest way to remove all packages installed by pip?

The easiest way to remove all packages installed by pip is to use the command pip freeze to get a list of all installed packages, and then pipe that list to pip uninstall -y, like this:

python python-packaging pip virtualenv