---
type: story
title: "First Light"
xp: 25
duration: 25
difficulty: 1
---

# First Light

> **[INCOMING — Mission Control, Earth]**
>
> Cadet, you've got the ground beneath you. Bash, Git, the cohort —
> all there. Now we hand you a language.
>
> Python. We picked it because it's small enough to learn fast, big
> enough to power half the systems running in production right now,
> and clear enough that you can read it like prose. The trade for
> "easy to read" is that some advanced concepts come later than they
> would in C or Java. We'll get to them.
>
> [TRANSMISSION CONTINUES]

## Why Python

Three reasons:

1. **Syntax that gets out of your way.** No semicolons. No braces.
   Indentation is structure. You'll spend more time thinking about
   the problem than fighting the language.
2. **Batteries included.** A standard library that lets you do
   networking, data, files, math, dates, and more without installing
   anything.
3. **It runs everywhere.** Web servers, data pipelines, scripts,
   embedded systems, machine learning. The skills transfer.

## How You'll Run It

You'll meet Python in three ways:

- **`python3 -c 'expression'`** — run a one-liner from the shell
- **The REPL** — type `python3` with no argument; you get an
  interactive prompt where every line runs immediately
- **A script** — write code in a `.py` file and run it with
  `python3 file.py`

The next three blocks walk you through all three.

## What's Coming

After this module:

- `strings` — text processing
- `flow` — conditionals and loops
- `collections` — lists, dicts, sets
- `functions` — your own building blocks
- `files-errors` — read/write files, handle failures
- `algorithms` — recursion, classic problems
- `oop` — classes
- `capstone` — the hard ones (8 queens, sudoku, more)

Then the checkpoint.

> **[CLOSING — Mission Control]**
>
> You already know how to learn here. The hard part — the courage to
> open a terminal — is behind you. The rest is practice and patience.
>
> Open Python on the next block.
>
> [END TRANSMISSION]