If you are not familair with Routes, check out my article creating endpoints using Routes.

Flask uses the MVC (Model View Controller) Framework. Just to make this as obvious as possible, I like my Flask apps to have the following.

• Model -> models.py
• View -> views.py
• Controller -> __init__.py

Let's say your Flask app has the following files.

├── main.py
├── database (directory)
│   ├── example.db
├── my-project (directory)
│   ├── __init__.py
│   ├── views.py
│   ├── models.py
│   ├── templates (directory)
│   │   ├── base.html
│   │   ├── home.html
│   │   ├── results.html
│   └── static (directory)
│       └── custom.css

For example, let's say your view (views.py in this example) has the following. In this example, "value" can be passed into the /Test page.

from flask import Blueprint, render_template

views = Blueprint('views', __name__)

@app.route("/Test/<value>")
def test(value):
    return render_template('home.html', value=value)

And perhaps test.html has something like this, using the value.

value = {{ value }}

Navigating to /Test and including a value should pass the value into the test.html page.