PYCodeAI

The CS Foundations Blueprint

Don't just write code.
Understand it.

Python, the math of computer science, the essential libraries and 12 real projects. All in one book.

Look inside ›Crack the secret code ›
322
pages
22
chapters
12
projects
61
videos

322-page PDF ebook · Instant download

Why this book exists

Tutorials teach syntax.
Nobody teaches foundations.

🧊

You've watched hours of videos, but you still freeze in front of an empty file.

📋

You can copy code, but you don't really know why it works.

🧩

Math, algorithms, OOP: everyone says they matter. Nobody connects them to real code.

the_fix.py
# one book, one path
path = ["math", "python",
        "libraries", "projects"]

for step in path:
    learn(step)  # in the right order

The first year of a CS degree, plus the practical skills a degree skips. In the right order, in one book. Intuition first, formulas second, code everywhere.

Part 1 · The math of computer science

Nobody teaches the math.
We do.

Every other course jumps straight into Python syntax and skips the math. But the math is what separates people who copy code from people who understand it. Algorithms, graphics, data science and AI all run on it.

Calculus page: optimization with graphs and Python code
Discrete mathLogic, proofs, counting, graphs, Big-O
CalculusDerivatives, integrals, gradient descent
Linear algebraVectors, matrices, eigenvectors, PageRank
ProbabilityBayes, distributions, Monte Carlo

Every idea gets a picture, an intuition, and Python code right next to the formula.

Part 2 · Python, beginner to pro

Real code.
Real output.

From your first variable to decorators, generators, async and algorithms. All 293 code examples were executed while the book was built, so every output panel shows the real result.

  • Variables, control flow, data structures, functions
  • OOP I & II: classes, inheritance, SOLID design
  • Advanced Python: generators, decorators, type hints
  • Algorithms, data structures, Git and pytest
Python page with terminal code and real output

Look inside

Designed to be read.

Real pages from the book. Swipe through, and tap any page to see it full size.

Linear algebra page
Linear algebra in code
Diagram page: how dictionaries work
Diagrams for every hard idea
Big-O chart page
Algorithms you can see
Probability distributions page
Probability & statistics
Level Up page with YouTube video cards and QR codes
61 videos with QR codes
Project starter code page
Starter code for every project
Cheat sheet page
Cheat sheets to print
Table of contents page
Clickable contents

Swipe ›

Why it's different

Not just theory.

293

Executed examples

Every code block was run while the book was built. The output you read is the output you'll get.

116

Exercises

From ★ to ★★★, with fully worked solutions.

61

Curated videos

The best lesson on YouTube for every topic, with a QR code.

85

Diagrams & charts

Every hard idea gets a picture.

12

Project blueprints

Architecture, milestones and starter code.

∞

Yours to keep

One PDF you download once and keep forever. Read it on a laptop or tablet, or print it. Clickable contents and bookmarks.

The full path

22 chapters. One path.

Part 0

Start Here

Python, VS Code, your first program, reading errors like a pro.

Part 1

The Math of CS

Discrete math · Calculus · Linear algebra · Probability & statistics

Part 2

Python: Zero to Pro

First steps · Control flow · Data structures · Functions · Errors & files · OOP I & II · Advanced Python · Algorithms · Pro workflow

Part 3

Essential Libraries

Standard library · NumPy · pandas · Matplotlib · Web, APIs & databases · Machine learning

Part 4

Project Blueprints

12 portfolio projects, from beginner to advanced.

Part 5

Appendices

Worked solutions · Printable cheat sheets · Your roadmap for what's next

Part 4 · From learner to builder

12 projects.
Never stare at an empty file again.

You learn by building. Every project is a full blueprint: the chapters you need, the architecture, the folder structure, step-by-step milestones, starter code and explanations along the way. They start with a game you can finish in an evening and grow all the way to a REST API with tests and a neural network you build from scratch.

  1. Guessing game + smart calculator
  2. To-do CLI with JSON storage
  3. Password generator + strength checker
  4. Expense tracker & dashboard
  5. Web scraper → dataset
  6. Weather dashboard with a live API
  7. Snake game with pygame
  8. Library system with OOP + SQL
  9. Sorting-algorithm visualizer
  10. REST API with FastAPI + tests
  11. Movie recommender
  12. A neural network from scratch
Project blueprint page: library management system

Who it's for

Is it for you?

Total beginners

Never coded? You start from the very first line. No skipped steps.

CS students

The first-year math, finally clear, and connected to code.

Self-taught developers

Fill the gaps: the math, real OOP design, algorithms, the pro workflow.

Future AI & data devs

NumPy, pandas, machine learning, and the math that makes them work.

🔐 Secret discount code

Crack the code.
Get 50% off.

Somewhere in this puzzle is a 2-letter discount code. Solve it, enter it at checkout, and the book is half price.

crack_the_code.py
# hint 1: the price (at checkout)
price = "???"  # ring a bell?
# hint 2: the name behind this book
brand = "PYCodeAI"
# hint 3: the code is only 2 letters
assert len(code) == 2
$ ACCESS GRANTED: 50% OFF

Type your guess for fun. The real check happens at checkout.
No spoilers in the comments 🤫

Questions? Answers.

Do I need any experience?

No. Chapter 0 starts by installing Python, and every concept is explained from scratch before it's used. If you already code, the math, OOP design, algorithms and projects will take you much further.

Is the math hard?

It's taught intuition-first, with pictures and Python code next to every formula. If you can do high-school algebra, you can follow it.

What format is it? How do I get it?

A 322-page PDF (A4). You download it right after checkout, and it's yours to keep. It reads well on a laptop or tablet and prints cleanly. The contents and bookmarks are clickable.

Which Python version does it use?

Python 3.12. Everything also works on Python 3.10 and newer.

Is checkout secure?

Yes. Payment is handled by Gumroad, a platform used by millions of creators. We never see your card details.

Where do I enter the secret code?

On the checkout page, in the discount code field. If you got it right, the price drops by 50% instantly.

The CS Foundations Blueprint

Learn it properly.
Build for real.

322 pages · 22 chapters · 12 projects · 116 exercises · 61 videos

Get the book

Secure checkout by Gumroad · Instant download
Cracked the code? Enter it at checkout.