In order to save this list to the file “requirements.txt”, run pip freeze > requirements. To see the list of modules installed in the virtual environment you need to run this command inside the activated virtual environment pip freeze ![]() Pip install requests List modules installed in the virtual environment If you want to install any python module into the virtual environment with pip, you need to activate the environment and then run “pip install” as usual source venv/bin/activate In order to deactivate the virtual environment, run deactivate Install python modules into virtual environment You will see that your terminal’s prompt is changed and now begins with “(source)”. So, if you gave to your virtual environment directory the name “venv”, the command for you will be source venv/bin/activate To activate a virtual environment created with venv just go to the project’s root and run source /bin/activate To create a virtual environment go to the root directory of your project and run python -m venv You can do it with the following command sudo apt-get install python3-venv Create a virtual environment with venv ![]() But if you use Ubuntu/Debian you need to install venv by yourself. Python virtual environments give you the freedom to test whatever version of modules, plugins, and Python packages you need. Generally, venv is a part of the Python3 and you don’t need to install anything. One more advantage – inside an activated virtual environment you can run python modules in an easier way. And then you can easily specify these dependencies in the requirements. For Python > 3.3, you can create a virtual environment with: python -m venv myenv After you have created your virtual environment, you can activate the virtual environment with: source myenv/bin/activate To deactivate the virtual environment, you can run deactivate. ![]() ![]() I case if these applications need same module but different versions of it you will be able to use only one of them.Īdditionally, a virtual environment gives you a possibility to control what dependencies has you application. The virtual environment can be found in the myenv folder. If you work with more than one python project on your computer you can get in trouble with modules’ versions. Once activated, it modifies the PATH environment variable with a custom bin directory that is located inside you virtual environment. Venv is a python package that allows you to use separate virtual environments for every python project you have.
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