Foundations: Python as an Instrument

Before you can cut, you need a scalpel you trust.

Everything downstream in this lab — a gradient, an attention head, a robot arm solving for a joint angle — is a small amount of arithmetic repeated an enormous number of times. This track builds the instrument, and it starts from nothing: installing Python, running your first program, and reading an error message without panic. It then works through the language itself with an emphasis on the mental model of names, objects, and arrays rather than on syntax trivia. Take this track slowly. Everything after it assumes the habits you build here.

The question this track answers

What is actually happening when a line of Python runs?

By the end you can

Install Python and run a program you wrote yourself
Read an error message and find the line that caused it
Read and write Python without guessing what a line does
Explain the difference between a name, an object, and a copy
Choose the right data structure for a job and justify the choice
Express loops as array operations and know why that matters
Make an experiment reproducible on someone else's machine

Scope

13 lessons, roughly 30 hours.

Module 1

Getting Set Up

Install Python, run a program, and learn to read the error messages you are about to generate a lot of.

Installing Python and an Editor

Thirty minutes of setup that removes every excuse for the next thirty tracks. Do it once, properly.

Hands-On Lab · 45m

Your First Program

A file, some text, one command. Everything else in this curriculum is an elaboration of this.

Hands-On Lab · 40m

Reading Error Messages

You will see thousands of these. Learning to read one properly is worth more than any syntax you memorize.

Hands-On Lab · 40m

Module 2

Python From First Principles

Names, objects, types, decisions, repetition, and functions — the pieces every program in this curriculum is assembled from. Work through these in order and type every example.

Values, Names, and Objects

Assignment does not copy. Understanding that one fact prevents a whole class of bugs later.

Concept · 25m

Numbers, Text, and Truth

The four basic types, how to convert between them, and the floating-point fact that will bite you in every later track.

Concept · 30m

Making Decisions

if, elif, else — how a program takes one path rather than another, and the indentation rule that enforces it.

Code Walkthrough · 30m

Repeating Work

Loops — the construct that turns a small amount of arithmetic into a trained model.

Code Walkthrough · 35m