Little time to learn Python?

Python puzzles help you to learn faster, smarter, and better. This book offers 50 educative code puzzles, 10 tips for efficient learning, 5 Python cheat sheets, and 1 accurate way to measure your coding skills. 13,000 Python students have already improved their coding skills on our puzzle-based learning academy Finxter.com.

"I very much enjoy your Finxter.com website because it has some real meat to the problems. Thank you so much for doing this project! I love it!"—David C.

"Your site is awesome."—Victor A.

"I found Finxter.com an excellent tool to brush up on my Python skills."—Jesper R.

As you work through Coffee Break Python, your Python expertise will grow—one coffee at a time. You will train wildly important Python topics such as

- Arithmetic operations: integer & float division, and modular arithmetic;

- Language elements: branching, loops, keywords, and functions;

- Data structures: integer, float, string, list, set, dictionary, and graph;

- Sequence operators: indexing, concatenation, slicing, and built-in functions;

- Function *arguments: default *, arbitrary *, unpacking *, keyword *;

- Set operations: lambda, filter, map, and intersection functions; and

- Algorithms: recursion, Fibonacci, Bsearch, sorting, guess & check, and graph traversal.

As a bonus, you will track your individual Python coding skill level throughout the book.

To get the most out of this book, you should be slightly beyond beginner-level in Python—e.g., you have already experience with another programming language, are a professional engineer, or a student.

So how do you spend your Coffee Break? Python!

Do ​​​​you want to learn ​​data science 44% faster?

​The new textbook Coffee Break NumPy leverages the scientifically proven way of puzzle-based learning to code!

"Students who were quizzed after studying a short text could recall significantly more information than students who were asked to reread it" (Karpicke, 2007b)

Fear of missing out on data science and machine learning?​ The trend of automation is not coming to a halt soon. Machines take over more and more traditional jobs from human workers.

But also highly-skilled knowledge workers such as doctors, traditional computer scientists, teachers, and financial analysts are under the danger to be replaced by machines.

This is the era of machine learning and data science.

And missing out on data science can be the #1 most costly mistake of your career.

​But you're in luck: this ​eBook package ​gives you a fun way to start learning data science with Python. ​It gives you a thorough introduction in one of Python's most important libraries for data science and machine learning: NumPy. 

​​I ​have written the book on the basis of the proven method of solving practical code puzzles and practice testing -- to make learning more fun, faster, and smarter.

And here's the best thing: practice testing is scientifically proven to generate ​up to 44% better learning retention and ​efficiency.​

So what's in it for you?

• ​Understand ​NumPy code ​quickly.
• Learn all the basic ​NumPy concepts and data structures.
• Finally understand ​the most important NumPy functions and how to use them for practical problems.

As an additional bonus, you ​can track your individual ​NumPy coding skill level throughout the book. After reading the book, you'll know exactly how good you are in comparison to your ​friends and colleagues.

To get the most out of this book, you should ​know the basics of Python — e.g., you have already ​read ​my previous book "Coffee Break Python".

The book is packed with 211 pages of in-depth NumPy content:

• ​4​6 educative code puzzles to test your skills and to make learning easy and fun!
• ​10 tips for efficient learning​ to help you stop wasting time!
• ​​1 NumPy cheat sheets to learn 80% of the language features in 20% of the space!
• ​1 accurate way to measure your coding skills because clarity is the first step to success!
• ​​[BONUS] 1 detailed NumPy ​tutorial for absolute beginners ​to get you started!

Have your "Coffee Break NumPy" now! ;)

Puzzle-based Learning Python

This book is the chess grandmaster way of learning Python. It offers you 127 unique and brand-new Python puzzles. Every puzzle points to gaps in your knowledge, challenges you to guess a solution, and then explains potential solutions, in an easy-to-understand manner:

~~~

# Here’s one example puzzle:

my_list = [1, 1, 1, 1]

my_list[1::2] = [2, 3]

print(my_list)

# What’s the output of this code snippet?

~~~

An easy, fun, and effective way of learning Python -- day after day -- in your COFFEE BREAK PYTHON!

Here's what research says about puzzle-based learning:

"Students who were quizzed after studying a short text could recall significantly more information than students who were asked to reread it"

-- Karpicke, 2007, Elsevier Journal of Memory and Language

Practice testing is scientifically proven to generate up to 44% better learning retention and efficiency.

Simply put: quizzes and puzzles work! More than 100,000 Finxters and thousands of "Coffee Break Python" book customers have already successfully improved their skills with code puzzles.

Learning does not happen in a linear and orderly manner. It's a probabilistic, chaotic, and iterative process of creating knowledge gaps in your brain -- and filling them with just the right information you need.

That's the premise of the "Coffee Break Python" textbook series.

What will you get out of the book?

• Improve your level of deep Python code understanding.
• Surprise your peers with your newly acquired code speed reading skills.
• Enjoy the small daily doses of intellectual challenges. A Finxter once called it "Sudoku for coders"! ;)
• Improve your brain's working memory by hammering down the most important concepts.
• Learn all the basic Python syntax elements.
• Discover your own skill level by tracking your puzzle-solving performance.
• Compare your skill level against other coders: are you a grandmaster of code?
• Enjoy the fun of rushing over Python -- from "hello world" to "recursive Quicksort".
• Get the best of all Finxter Python cheat sheets to revive 80% of the Python features in 20% of the time.
• Get your dream job and rock future code interviews!

And take one step forward mastering the most popular programming language ON THE PLANET!

Google engineers are regular expression masters. Why? Because the Google search engine is a massive text-processing engine that extracts value from trillions of webpages. 

Facebook engineers are regular expression masters. Why? Because social networks like Facebook, WhatsApp, and Instagram connect humans via text messages.

Amazon engineers are regular expression masters. Why? Because eCommerce giants ship products based on textual product descriptions. 

When text meets computer science, regular expressions are already here.

The Smartest Way to Learn Python Regex transforms you into a regular expression master.

How? With our three-step, innovative approach, you'll leverage all the scientifically proven insights of excellent teaching.

• Step 1: Read a book chapter about a regular expression topic to learn all the basics you need to get started. 
• Step 2: Watch a course video on YouTube to make it stick. We specifically designed the videos to deliver the exact information from the chapter in a nutshell. 
• Step 3: Solve a code puzzle on Finxter.com to push your understanding to the next level and track your learning progress accurately.

You'll learn vital regular expression topics such as Kleene star, plus operator, matching groups, lookaheads, special characters, character sets, and many more. 

Here's the deal: read this book, and you'll be able to read and understand any regular expression you'll ever encounter in practice.

Are you a master Python coder? Prove it!

Coffee Break Python - Mastery Workout helps you boost your Python skills and reach mastery level. The approach is simple: you solve 99 really hard Python puzzles that get harder as you progress with the book.

A clear path to Python mastery!

How do grandmasters of chess become that way? They study thousands of chess positions​. ​They look at a chess position, ​​​commit to a solution, and compare ​​it against ​the "gold standard" -- the best move in a given position.​This book is the chess grandmaster​ way of learning Python. It offers you ​99 ​challenging, exclusive, and brand-new Python puzzles. ​Every puzzle points to gaps in your knowledge, challenges you to guess a solution, and then explains ​the result​.

​An easy, fun, and extremely effective way of not only learning but mastering Python -- day after day -- ​in your COFFEE BREAK PYTHON!

Burn ​99 new Python patterns into your brain and rewire your synapses.

Here's what research says about puzzle-based learning:

"Students who were quizzed after studying a short text could recall significantly more information than students who were asked to reread it"

-- Karpicke, 2007, Elsevier Journal of Memory and Language

​​Practice testing is scientifically proven to generate ​up to 44% better learning retention and ​efficiency.​

​​Simply put: quizzes and puzzles work! More than 100,000 Finxters and thousands of "Coffee Break Python" book customers have ​successfully improved their skills with code puzzles.

​Learning ​does not happen in a linear and orderly ​manner​. It's a probabilistic, chaotic, and iterative process of creating knowledge gaps in your brain -- and ​filling them with just the right information​ you need.

That's the premise of ​the "Coffee Break Python" textbook series.

​Here's how you will change by reading this book:

• Improve your ​level of deep ​Python code understanding.
• ​Surprise your peers with your newly acquired code speed reading skills.
• Enjoy the small daily doses of intellectual challenges​ ("Sudoku for coders").
• ​Improve your brain's working memory by hammering down the most important concepts.
• Learn all the ​advanced Python syntax elements.
• ​Discover your own skill level by tracking your puzzle-solving performance.
• Compare your skill level against other coders: are you a grandmaster of code?
• ​Enjoy the fun of rushing ​through very (very) hard Python ​puzzles.
• Get the best of all Finxter Python cheat sheets to revive 80% of the Python features in 20% of the time.
• ​​​Rock your ​upcoming code interviews and get your dream job!
• And take one step forward mastering the most popular programming language ON THE PLANET!

Is There a Six-Figure Freelance Developer in You?

Leaving the Rat Race with Python shows you how to nurture, grow, and harness your work-from-home coding business online --- and live the good life!

It's an insider's guide to freelance developing. Start your new thriving coding business now!

• Do you want to learn about becoming a Python freelancer and start your thriving coding business online?
• Do you want to regain control of your life? You've got the right book in your hands.
• Are you committed to succeeding in life and business?

This practical how-to book will help you nurture, grow, and harness your new online coding business plant---even if you've got little or no experience in both the coding and the business ecosystems.

If you follow the instructions in this book, you'll make this book the most profitable investment in your life, and you'll also create new joy, happiness, and a sense of independence and self-reliance.

Who This Book Is For?

• You're a coding business owner or online freelancer.
• You want to participate in the workforce disruption of the 21st century.
• You want to build and control more income streams for you and your family.

Who This Book Is NOT For?

If you want to be an employee for the rest of your life, this book is not for you. Period.

Are you this guy? Stop reading now and grab any of the myriads of programming books on the market (you don't need business skills -- technical skills are enough).

About the Authors

Dr. Christian Mayer -- Founder Finxter.com, Computer Scientist, Blogger, and Freelancer

I just finished working as a doctoral computer science researcher on distributed systems in Germany. As a researcher, I have taught many students in computer science, graph theory, and distributed systems. 

My passions are writing, reading, and coding. But my #1 passion is to serve aspiring coders through Finxter and help them to boost their skills. 

I practice what I preach teaching only tricks I learned from building my own freelance developer business online.

Lukas Rieger -- Finxter COO & Instagram Influencer (60k subs), DevOp Engineer, Computer Scientist

After my apprenticeship as a practical coder, I studied software engineering at University of Stuttgart where I worked together with Christian in distributed graph processing research. For the last years, I have been working as a developer and Cloud Operations Engineer.

I discovered my passion for teaching computer science as a coding tutor. With this book, I want to share with you my love for Python -- because of its clarity, flexibility, and vast range of libraries!

Do You Want to Create Your Thriving Coding Business Online?

• 50 Expert Secrets to instantly boost your earnings and scale your business
• 1 Freelance Developer Report to help you participate in the new workforce disruption
• 10+ Author Videos to chit-chat with experts about client acquisition, conversion, and business strategy.
• [BONUS] 1 Free Hourly Time Tracking Template to manage your time and put yourself on a road to increasing hourly rates.

What's the only difference between you and the person earning double your income? ... Skills!

Start developing your new high-income skill "Python coding". You'll love it! ❤

31,419 Ambitious Coders Trust Finxter!

Data is the new oil -- whoever develops the skills to harvest this largely untapped asset class will increase their value in the 21st-century marketplace.

• Computers and sensors create ever-growing data sets that become increasingly relevant in every part of our lives.
• Smartphones collect billions of GPS traces that reveal valuable information towards new mobility solutions and truly smart cities.
• Smartwatches track the heart rates of millions of people to detect health problems and prevent unnecessary deaths.
• Intelligent cars collect myriads of sample data points that increase traffic efficiency, prevent millions of car accidents, and save humanity hundreds of millions of hours in traffic jams.

Due to Moore's Law -- the number of transistors on a microchip doubles roughly every two years -- it became financially viable to store, process, and analyze hundreds of terabytes of data.

By reading this book, you'll learn the powerful skill of analyzing and processing data with Python's Pandas framework.

This book is not a technical introduction to Blockchain technology; there's plenty of freely accessible material on that. Instead, this book makes the case that Blockchains will have at least as much economic impact in the 21st century as corporations in the 20th century.

The Blockchain Economy provides you different perspectives on the drastic potential of Blockchain technology to disrupt nearly every business or political system in existence today. 

Some of the ideas may appear evident to you; others may not yet. But in due time, many of them will be implemented in the real world by practitioners, programmers, and Blockchain architects. Myriads of new ideas and applications of Blockchain technology will see the light of the day. 

Due to the disruptive value proposition of providing permissionless, trusted, secure, and decentralized information management, these applications will create new blue oceans of opportunity, breaking out of the bloody red oceans of existing centralized financial infrastructures.

In particular, you'll learn about the economic impact of Bitcoin, decentralized finance (DeFi), non-fungible tokens (NFTs), censorship-resistance, governance, and many more key Blockchain concepts--and their impact on today's economy.

Why do you waste your time PASSIVELY reading Python books?

Puzzle-based learning is an ACTIVE learning technique. With code puzzles, you will learn faster, smarter, and better.

The Coffee Break Python book series teaches you Python in byte-sized code puzzles. You solve a code puzzle a day while you enjoy your morning coffee. It’s that simple.

What do others have to say?

21,000 online Python students have already improved their coding skills with our unique puzzle-based learning technique:

"I very much enjoy your Finxter.com website because it has some real meat to the problems. Thank you so much for doing this project! I love it!"

—David C.

"Your site is awesome."

—Victor A.

"I found Finxter.com an excellent tool to brush up on my Python skills. I totally love the setup of playing against the questions - such a wonderful idea <3 ... and great questions."

—Jesper R.

Why should you read this book?

Coffee Break Python Slicing is all about growing your Python expertise—one coffee at a time. The focus lies on the important slicing technique to access consecutive data ranges. Understanding slicing thoroughly is crucial for your success as a Python developer.

This book teaches you everything you need to know about slicing in Python.

As a bonus, you will track your individual Python coding skill level throughout the book.

Who should read this book?

You are slightly beyond beginner-level in Python. For example,

• You have already experience with another programming language—it’s time to tackle Python.
• You are a professional engineer and want to brush up your Python skills.
• You are a student and need to get better at Python for academic courses.
• You have read the first book of our Coffee Break Python series.

So how do you spend your Coffee Break? Python!

Tired of ​Brain Fog​?

Brain Games Python

​99 Brain Teasers to Energize Your Brain Cells and Python Logic Skills

​The Groundbreaking New Puzzle Book That

1. ​Revives Your Brain Cells
2. ​Boosts Your Computational Intelligence
3. Launches Your Programming Skills in Python

​... Even If You Have Zero Programming Experience!

# PUZZLE
'''Bob is 4 years younger than Frank and 10 years older than Alice. Ann is with 35 years 6 years older than Alice. What's the age difference (in years) between the oldest and youngest person?'''

Can you solve this puzzle? Or try the next one:

# PUZZLE
[11, -10, 4, -3, 4, 4, ?]

What's the next sequence element? Here's a third more Pythonic puzzle:

# PUZZLE
a, b = True, True

if b or a or not a and not b:
  if a:
    print('love')
  elif b and a or not a:
    print('42')
  print('42')
elif a and b or not a:
  if a or b or not b or not a:
    print('42')
  print('yes')
else: 
  print('yes')

The book is full with 99 such brain puzzles that make you smarter -- in logics, intelligence, and Python programming!

(Written for absolute beginners and intermediates in the Python programming language.)