YouTip

# Flask Installation # Flask Installation Before we start writing Flask applications, we need to prepare the Python environment and install Flask. Flask installation is relatively simple. Flask is a Python library, so first make sure you have Python installed on your computer. * * * ## Python Version Requirements Flask 3.x requires Python 3.9 or higher. If you haven't installed Python yet, you can download and install it from [python.org](https://www.python.org/downloads/). After installation, open the terminal to verify: $ python3 --version Python 3.12.3 $ pip3 --version pip 24.0 from /usr/lib/python3.12/site-packages/pip (python 3.12) > macOS and most Linux distributions come with Python 3 pre-installed. If you're using Windows, make sure to check the Add Python to PATH option during installation. * * * ## Virtual Environment A Virtual Environment is a standard practice for Python projects, creating an independent Python package space for each project. ### Why Use Virtual Environment Suppose you have two projects: Project A requires Flask 3.0, and Project B requires Flask 2.3. If installed globally, the two Flask versions would conflict with each other. Virtual environments give each project its own independent dependencies, preventing interference. Python's built-in venv module can create virtual environments without needing additional tools. ### Create a Virtual Environment First create the project directory, then create the virtual environment within it: $ mkdir tutorial-flask-