P39 · Running Python & Notebooks
the "you are not lost" pillar: what a notebook / cell / rung / import line / error is; run your first cell; read output and friendly errors
You have never written code and that is fine: run your first cell, read errors without fear, and learn what notebooks, rungs and imports actually are.
Everyone who has never coded shares the same quiet worry: that they will click something, the screen will fill with strangeness, and they will be lost. This block is built to remove that worry before anything else is taught. You will run your first line of real Python within minutes, see exactly what the machine answers, and learn that even an error is just the machine explaining itself — in a message you can read.
Then, briefly, you learn to read before you write: what the page of cells in front of you actually is, what those small graded exercise boxes are, and what the import line at the top of nearly every example really does. None of it requires writing code of your own yet. When you leave this block, no surface on the screen is a mystery — which is precisely the state the rest of the discipline assumes.