Lesson 1: Getting Harbourline's data into your hands
19 min read·13 Oct 2026
Module 4 · Lesson 1 · About 50 minutes · Needs: Module 2 (the lookup prototype); basic Python and SQL
The situation
Monday 23 March 2026, week 2. Your prototype ran on eight sample shipments typed into a notebook. Rafael wants it on real data, which lives in five places, each with its own owner and its own way in.
Every request ends at Viktor Hale's desk. This lesson follows one file, the TMS nightly export, from the request for it to the S3 bucket harbourline-exports, and meets each kind of source on the way.