Python Flask

Apr 6, 2023

# Composition

app.py will have the Python code for our web server.
requirements.py includes a list of required libraries for our application.
static/ is a directory of static files, like images and CSS and JavaScript files.
- index.html
- layout.html
templates/ is a directory for HTML files that will form our pages.

# layout.html

With the {% %} syntax, we can include placeholder blocks, or other chunks of code. Here we’ve named our block body since it contains the HTML that should go in the <body> element.
Basically placeholder

# Lib

# Request

request.args.get("name") catch ?name=David

# render_template

return render_template("index.html", name=name)

return render_template("greet.html", name=request.form.get("name", "world"))

# Redirect

use to redirect to another route

# Paradigm

The controller contains our “business logic”, code that manages our application overall, given user input. In Flask, this will be our Python code in app.py.
The view includes templates and visuals for the user interface, like the HTML and CSS that the user will see and interact with.
The model is our application’s data, such as a SQL database or CSV file, which we haven’t yet used.