What you are going to build

You will finish this course with a Python program that reads a file of customer support tickets, asks a model to sort each one, checks every answer, and saves the results.

It starts from nothing. Lesson 1 is a single line that prints a word, and every lesson after it adds one idea and uses it straight away on the same tickets.

What a model is, for this course

A model here means a large language model: a program you send text to and get text back from. The frameworks you will meet after this course are mostly ways of sending that text, reading the answer, and deciding what to do with it.

You do not need an account or an API key. In lesson 17 you write a small function that answers the way a model does, and the rest of the course uses it. Everything you learn works the same when a real model takes its place.

What you need

• A browser, for lessons 1 to 28. Each lesson with a finished program has an editor beside it: change the code and press Run.
• Python 3.10 or later on your own computer, for lessons 29 to 32, where you install packages and run tests.

No programming experience is assumed. If you already know some Python, the quizzes at the end of each part are a quick way to find the lessons worth reading.