Flask Learning Lab

Every page explains which code ran, and why.

What this is

This is a tiny Flask website where every page explains itself. Click the navigation links and watch the debug panel update.

What to try

Go to Forms and submit a POST request.
Go to Sessions and store a value in a signed session cookie.
Go to Uploads and upload a small file.

Where the code is

Route functions live in flask_routes.py and templates live in templates/. Helper modules are kept in dependencies/ so you can see what is “support code”.

What Flask just did 🔎

Route function used

show_home_page

HTTP method

GET

Template used

home_page.html

Files involved

flask_routes.py
templates/home_page.html
dependencies/flask_debug_information.py

Execution steps

- Flask matched the URL path to a route function.
- No form submitted; this is a plain GET request.
- Route function read inputs from request (query/form/files).
- Route function created a debug information object explaining what happened.
- Route function rendered a Jinja template with page data + debug info.

Received form fields

(none)

Extra debug values

{
  "request_path": "/"
}