The /var/www directory is completely independent of Python 3.
/var/www is a Linux system convention for storing website files. It has no inherent relationship to any programming language or web server software. It’s simply a standard location on the hard drive.
It’s a convention: Most system administrators and web server documentation (such as Apache and Nginx) expect site files to be in /var/www
Although /var/www and Python 3 are not directly connected, you use them together because it is the cleanest and most organized way to set up a web server in a Linux environment.
/var/www: This is the root directory for all websites on the server. It’s a central, organized place to host web files. It’s like a main folder called “Websites.”
/var/www/my_site: This is a subdirectory that contains the files for a specific website. If you decide to create another site later (for example, a blog or online store), you can create a new folder for it (/var/www/my_blog or /var/www/my_store). This keeps your projects separate and organized.
While you could put your index.html file directly in /var/www, using a subdirectory prepares you for the future. Plus, if you’re using a more robust web server like Nginx or Apache, they expect this type of structure to serve multiple websites from a single server.
The two-directory structure helps you stay organized and scale your server more easily in the future.