Developing a simple GUI web application

This section aims to demonstrate how the Flask framework can be used to develop a simple web application. The focus is shifted toward building an application that captures form data, which is then passed to our deployed machine learning API:

1. To start, create the following directory structure:

   Figure 9.6 – Web application directory structure

   Most of the logic is handled in app.py, and the templates folder is used to store HTML files for the app – more on that in a bit.

2. This time we'll organize the code a bit better, so you'll need to create an additional file for storing the environment variables. Inside the root directory (webapp), create a file called .env – and populate it with the following:

   SECRET_KEY=SecretKey
   HOST=0.0.0.0
   PORT=9000
   API_ENDPOINT=http://ec2-18-220-113-224.us-east-2.compute.amazonaws.com:8000/predict

   Creating a separate file like this is considered to be a best practice when developing...