While you’re waiting…

Check

1. python --version
1. If not Python 3, download from https://www.python.org/downloads/
2. pip install Flask
• MUST BE capital F

NEXT

git clone https://github.com/thomasdriscoll/workshops-open-source-illinois.git

• Open workshop2 folder in favorite text editor
• This Powerpoint is on line 2 of server.py

Flask + API Workshop

By Thomas Driscoll and Roshini!

What’s a REST API?

• REST = Representational State Transfer
• A server that performs functions on request
• What’s a server?
• What kind of functions?
• What do I mean by request?

ReST API Operations

URL Routing Example

https://calendar.google.com/calendar/r/week

Go to Google calendar and follow along!

Challenge: How would you change your view to be day? month?

What is Flask?

• A Python microframework
• Most frameworks have
• Accounts, authentication, authorization, roles, etc.
• Database abstraction via an object-relational mapping.
• Input validation and input sanitation.
• Web template engine.
• Python CAN DO ALL OF THESE
• Just use libraries
• I’ll actually use all these in this workshop hehehe
• https://flask.palletsprojects.com/en/1.1.x/

File Structure of a Flask project

/myproject

/server.py

/templates

/index.html

/static

/helper.js

Templating

• Shoutout to my HTML workshop attendees <3
• Jinja2 templating
• https://jinja.palletsprojects.com/en/2.11.x/
• Why? D.R.Y.
• How to think of it?
• Creating a base form
• Other files fill in the “insert non-generic content here” parts
• Specify url and build your page!

REST Operations in Flask

… But for real

What we will be doing today

1. Walk through basic GET/POST together
2. Fill out remaining operations independently
3. Work together on PUT from HTML to server
4. Render your own page to interesting things!!!