###### About

<https://www.python.org/>

###### Procedure

1. Sign in as root user

2. Run `apt install python3 python3-venv` to install Python 3.x, whichever version may be the latest

    !!! info "Info"

        The package `python3-venv` is included because it is in best practice to containerize Python projects and keep their dependencies isolated in environments where more than one application may be hosted

3. Run `python3 --version` to identify the version of Python installed

###### New Projects

1. Run `mkdir myapp && cd myapp` to create a new home for our Python project

2. Run `python3 -m venv venv` to create a virtual environment (venv)

3. Run `source ./venv/bin/activate` to activate

    !!! info "Info"

        Calling `python3` or `pip3` is no longer necessary. The alias `python` is symbolically linked to the correct executable and a copy of pip is included within the virtual environment. Installing packages using `pip install -r requirements.txt` or `pip install x` will install the downloaded libraries and modules local to this environment!

4. Run `python -u myapp.py` to run a script using our venv

    !!! tip "Tip"

        The `-u` in `python -u myapp.py` is instructing the Python interpreter to run in unbuffered output mode

###### Optional

1. Daemonize the Python application

    1. Create a new shell script via `nano myapp.sh`

        ```sh title="/root/myapp/myapp.sh"
        #!/bin/bash

        cd /root/myapp
        source ./venv/bin/activate
        python -u myapp.py
        ```

    1. Run `chmod +x myapp.sh`

    2. Learn about [installing Node.js and PM2](?q=Node.js)

    3. Run `pm2 start myapp.sh && pm2 save`