How to install Python3 in Ubuntu20.04 in Virtual Environment

This article mainly shows you how to install Python3 in Ubuntu20.04 in a virtual environment, the content is simple and easy to understand, I hope you can learn, after learning, there will be a harvest, the following let the editor take a look at it.

The following is done on my virtual machine.

1. Install pip3

Sudo apt install python3-pip

two。 Install a virtual environment

Sudo apt install virtualenvsudo apt install virtualenvwrapper

3. Modify the configuration file to set environment variables

Cd ~

Vim .bashrc

Add the following two lines after the .bashrc file

Export WORKON_HOME=$HOME/.virtualenvs source / usr/share/virtualenvwrapper/virtualenvwrapper.sh

Among them, the sentence "usr/share/virtualenvwrapper/virtualenvwrapper.sh" is different from other Ubuntu versions. Other bosses are "source / usr/local/bin/virtualenvwrapper.sh" on Ubuntu18.04, and the specific file location can be found and filled in.

Tip: if you can't find virtualenvwrapper.sh, you can use the following command to find the path where the file is located and change the path you found.

Sudo find /-name virtualenvwrapper.sh

4. Enable profile

Source .bashrc

At this point, the virtual environment can be created normally.

PS: let's take a look at Python3 to create a virtual environment

Purpose

Virtual environments are used to isolate Python libraries between different projects

Create a virtual environment

Python3 has a built-in venv module. First create a project directory. After entering the directory, execute

Python3-m venv venv

Activate the virtual environment

Before you start working, activate the appropriate virtual environment:

. Venv/bin/activate

Under Windows:

Venv\ Scripts\ activate

When activated, your terminal prompt displays the name of the virtual environment.

Install the appropriate modules, such as:

Pip install Flask

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