Online Python Practice Exercises for 2026

Explore ways to practice Python with exercises, courses, and tutorials for beginners and job seekers. Level up your Python skills!

What’s the best way to learn Power BI?

There are lots of options for learning Power BI. But not all of them are equally effective, and some cost a lot more than others...

SQL Certification: 15 Recruiters Reveal If It's Worth the Effort

SQL is a key skill for data jobs. But you probably DON'T need a SQL certification to get a job. In fact, it might not even help! Here's why.

Beginner Python Tutorial: Analyze Your Personal Netflix Data

How much time have you spent watching The Office on Netflix? Find out with this entry-level tutorial on analyzing your own Netflix usage data!

How to Use an API in Python

Learn to use APIs in Python with practical examples. Cover GET/POST requests, query parameters, JSON data, and error handling with real code.

Python for Loop: A Beginner's Tutorial

Learn to write Python for loops with statements like break and continue to iterate through lists to clean and analyze large datasets quickly.

Analyze Facebook Data to Find Out If You Post Too Much

Learn how you can analyze Facebook data and plot it using some basic Python to get a true picture of your posting habits.

Data Analytics Certifications: Do I Really Need One?

Do you need a data analytics certification to get a job as a data analyst, or to get some other data job? Here's the unbiased answer.

How to Use Dataquest

Although our platform is pretty self-explanatory, learning how to use Dataquest can help you work more efficiently.

Preparing for the Data Science Job Interview

Learn how to prepare for data scientist and data analyst job interviews with this in-depth guide (including sample questions) to data science job interviews.

The Data Science Career Guide

This in-depth guide is designed to take you through the entire data science job application process, to help you get the data science career of your dreams.

Starting Your Career in Data Science: What Are Your Options?

The first step in your data science job search: identifying what your options are, and what positions are the best fit for your skill set.

How and Where to Find Great Data Science Jobs

Learn both how and where to find data science jobs (hint: don't start with LinkedIn or Indeed)

How to Fill in Job Application Forms and When to Apply

How to fill in job application froms, and other things you need to consider when applying for data science jobs, like social media, cover lives, etc.

How to Write a Data Science Resume (an 8-Step Guide)

How can you get a data science job? It all starts with a great resume: one that frames your data analysis and data science projects in the right way.

How to Create a Project Portfolio for Data Science Job Applications

Create a standout data science portfolio with our guide. Learn presentation tips to showcase your skills and advance your career.

Top Tips for Learning R from Africa R’s Shelmith Kariuki

Pick up some top tips for learning R from Shelmith Kariuki, a certified Tidyverse instructor and a leader in the Africa R community.

Applying to Business Analyst Jobs, Part 2: Interview and Decision

How can you ace the interview for business analyst job roles? And what do you do once you've gotten beyond the interview and started getting offers?

Applying to Business Analyst Jobs, Part 1: The Application

How can you stand out from the crowd when applying to business analyst positions? Part one of our job application guide will help!

What to Expect When You Start Learning Power BI

Find out what it's like to learn Power BI, whether it's hard or easy, and how long it will likely take you to learn.

Why Business Analysts Need to Learn Power BI

How to Become a Business Analyst

The demand for business analysts is steadily increasing. Here's what you need to know to get started in the field.

Why You Should Become a Business Analyst

Business analysis is a fast-growing, high-paying field with low barriers to entry. Here's what you need to know to get started.

54 of the Best Data Science Books (Vetted by Experts)

Learn Python, R, machine learning, social media scraping, and much more from these free data science books you can download today.

Learn Data Journalism: Avoid My 3 Colossal Mistakes

Becoming a data journalist and learning to code isn't as difficult as you might think, but you have to approach it in the right way to avoid common mistakes

How to Find a Data Science Job (Advice from a NASA Datanaut)

Finding an entry-level position in data science is absolutely possible. In this post, we discuss how to do it.

Why Data Science Bootcamps Aren't Ideal (Plus Alternatives)

Should you enroll in an online data science bootcamp or try one of the expensive offline schools? Compare your options stack for learning data science.

11 Real World Applications for Python Skills

What are the use cases for Python? Here are 11 real-world applications for Python across a wide variety of industries and businesses.

SQL Commands: The Complete List (w/ Examples)

What can you do with SQL? Here's a reference guide to the most commonly-used SQL commands, with code examples you can copy-paste.

SQL vs MySQL: Key Differences Explained (2026)

SQL and MySQL are important tools for working with data. But what are they, exactly, and how are they different? Let's clear that up.

SQL Interview Questions — Real Questions to Prep for Your Job Interview

A lot of the SQL interview questions you'll find on the web are generic: "What is SQL?" You'll never be asked that. We've got REAL questions to help you prep

How to Learn Fast: 7 Science-Backed Study Tips for Learning New Skills

Want to learn a new skill as fast as possible? These science-based tips will show you how you can learn more efficiently.

How to Use If-Else Statements and Loops in R

Learn to use if-else statements, for loops, and while loops to build complex conditional programs in R, a valuable skill for aspiring data scientists.

Can Anyone Learn to Code? Yes! (It’s Science)

Anyone can learn to code — and that's not just a nice-sounding platitude, there's real science backing it up. Not a math person? That could actually help...

Tutorial: Add a Column to a Pandas DataFrame Based on an If-Else Condition

Need to add a column to your pandas DataFrame based on values found elsewhere in the DataFrame? There's an easy way to do that using NumPy!

15 Python Libraries for Data Science You Should Know

There are quite a few great, free, open-source Python libraries for data science. In this post, we'll cover 15 of the most popular and what they can do.

Python for Beginners: Why Does Python Look the Way It Does?

When you're just getting started, looking at Python can be intimidating. Why the different colors? What are those line breaks for? Here are the answers you seek.

How to Analyze Survey Data with Python for Beginners

Learn to analyze and filter survey data, including multi-answer multiple choice questions, using Python in this beginner tutorial for non-coders!

How Much Have You Spent on Amazon? Analyzing Amazon Data

How much have I spent on Amazon? That's a scary question, but if you want to know the answer, here's how you can find it...and a lot more!

What is Data Science?

Data science has been called the sexiest career of 2019. What is data science, really, and how can you get your foot in the door of this exciting career?

Presentation Tips to Improve Your Data Science Communication Skills

Improve your data science communication skills and make your presentations more convincing by following these simple steps.

Stop Procrastinating and Start Studying Using Science

Learn to stop procrastinating and improve your study results with some recommendations from the world of science with these research-based tips.

Tutorial: Why Functions Modify Lists and Dictionaries in Python

In this beginner Python tutorial, we'll take a look at mutable and immutable data types, and learn how to keep dictionaries and lists from being modified by our functions.

Applying to Jobs? Don’t Make This Mistake in Your Data Science Portfolio

Applying for data science jobs? Don't make a mistake in your project portfolio or Github that could rule you out right out of the gate!

The Phone Proximity Effect: Your Phone Could Be Sabotaging Your Studies

Are you falling victim to the 'phone proximity effect'? If you study with your phone close to you, studies suggest it may be hurting your performance.

9 Reasons Excel Users Should Consider Learning Programming

You can use Excel for some data analysis, but should you? Here are nine reasons learning data science and programming is way, way better than Excel.

The Key to Getting a Data Science Job, According to Briana Brownell

Recruiters want data scientists who know how to communicate. To get a job in data science, you need to know how to show that skill on your resume.

11 Design Tips for Data Visualization

Making your data both visually understandable and visually attractive can help it get more attention and help you stand out, whether your audience is the entirety of the internet or just your company’s CEO in the weekly meeting.

Does Sharing Goals Help or Hurt Your Chances of Success?

So you’ve decided you want to learn data science. Will sharing your goals help? Here's what psychology has to say.

What to Consider When Choosing Colors for Data Visualization

Data Visualisation represents numbers with shapes – and no matter what these shapes look like, they need to have a color. Use these tips to pick the right colors.

R Fundamentals: Building a Simple Grade Calculator

In this beginner R programming tutorial, learn the basics and syntax of R as you go hands-on building a simple grade calculator.