About Joanna Jablonski

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I love working in developer education because I like code, words, and people. (And Python!)

As the Executive Editor of Real Python, I spend my time planning curricula, creating educational resources, building an exceptional team, and more.

When I’m not at my desk, I enjoy exploring the beautiful city of Vancouver on foot, laughing with my pub trivia team, and experimenting with seitan recipes.

Let’s level up our Python together!

Tutorials by Joanna:

Python's F-String for String Interpolation and Formatting
CPython Internals: Paperback Now Available!
Natural Language Processing With Python's NLTK Package
Python Basics: Paperback Now Available!
Start Contributing to Python: Your First Steps
The Real Python Podcast: It's Been a Year!

Tutorials Joanna Contributed to:

Primer on Python Decorators
Build Command-Line Interfaces With Python's argparse
Python Timer Functions: Three Ways to Monitor Your Code
How to Run Your Python Scripts and Code
Effective Python Testing With pytest
Socket Programming in Python (Guide)
Python GUI Programming With Tkinter
Linear Regression in Python
How to Round Numbers in Python
When to Use a List Comprehension in Python
Basic Input and Output in Python
Beautiful Soup: Build a Web Scraper With Python
Python Exceptions: An Introduction
Python String Formatting: Available Tools and Their Features
Python Virtual Environments: A Primer
Logging in Python
Speed Up Your Python Program With Concurrency
Python range(): Represent Numerical Ranges
How to Iterate Through a Dictionary in Python
Interacting With Python
Using the Python zip() Function for Parallel Iteration
Variables in Python: Usage and Best Practices
The Python Square Root Function
A Guide to Modern Python String Formatting Tools
Using Python's pip to Manage Your Projects' Dependencies
Lists vs Tuples in Python
How to Install Python on Your System: A Guide
Primer on Jinja Templating
Functional Programming in Python: When and How to Use It
How to Write an Installable Django App
Strings and Character Data in Python
Split Your Dataset With scikit-learn's train_test_split()
Working With JSON Data in Python
Understanding the Python Mock Object Library
Basic Data Types in Python: A Quick Exploration
How to Get the Most Out of PyCon US
PyTorch vs TensorFlow for Your Python Deep Learning Project
Build a Blog Using Django, GraphQL, and Vue
Python's Requests Library (Guide)
How to Write Beautiful Python Code With PEP 8
Inheritance and Composition: A Python OOP Guide
Build a Blog From Scratch With Django
Operators and Expressions in Python
Object-Oriented Programming (OOP) in Python
Get Started With Django: Build a Portfolio App
Python & APIs: A Winning Combo for Reading Public Data
Create and Modify PDF Files in Python
Build Your Own Face Recognition Tool With Python
Python's pathlib Module: Taming the File System
Develop Data Visualization Interfaces in Python With Dash
Working With Linear Systems in Python With scipy.linalg
Natural Language Processing With spaCy in Python
Python REST APIs With Flask, Connexion, and SQLAlchemy – Part 3
Python REST APIs With Flask, Connexion, and SQLAlchemy – Part 2
Python REST APIs With Flask, Connexion, and SQLAlchemy – Part 1
A Practical Introduction to Web Scraping in Python
Python and PyQt: Building a GUI Desktop Calculator
Level Up Your Skills With the Real Python Slack Community
How to Publish an Open-Source Python Package to PyPI
pandas GroupBy: Your Guide to Grouping Data in Python
Combining Data in pandas With merge(), .join(), and concat()
Modulo String Formatting in Python
Python's sum(): The Pythonic Way to Sum Values
Build a Personal Diary With Django and Python
A Python Guide to the Fibonacci Sequence
Using Python Optional Arguments When Defining Functions
Python's deque: Implement Efficient Queues and Stacks
Python's ChainMap: Manage Multiple Contexts Effectively
Python and REST APIs: Interacting With Web Services
Python's collections: A Buffet of Specialized Data Types
Your First Steps With Django: Set Up a Django Project
Python Community Interview With Dustin Ingram
Using FastAPI to Build Python Web APIs
What Can I Do With Python?
Python's Counter: The Pythonic Way to Count Objects
Reverse Python Lists: Beyond .reverse() and reversed()
Simplify Complex Numbers With Python
Python Practice Problems: Parsing CSV Files
Python's filter(): Extract Values From Iterables
Python Community Interview With Sebastián Ramírez
Context Managers and Python's with Statement
Python News: What's New From May 2021
Visualizing Data in Python Using plt.scatter()
Build a Bulk File Rename Tool With Python and PyQt
Embedded Python: Build a Game on the BBC micro:bit
Write Pythonic and Clean Code With namedtuple
Recursion in Python: An Introduction
Python News: What's New From April 2021
Build a Platform Game in Python With Arcade
Python Community Interview With Moshe Zadka
Deploying a Python Flask Example Application Using Heroku
Build a Python Directory Tree Generator for the Command Line
The k-Nearest Neighbors (kNN) Algorithm in Python
Python News: What's New From March 2021
Python Community Interview With Will McGugan
OrderedDict vs dict in Python: The Right Tool for the Job
Python Community Interview With Dane Hillard
Build an Asteroids Game With Python and Pygame
Python AI: How to Build a Neural Network & Make Predictions
Python Community Interview With Ewa Jodlowska
Build a Contact Book With Python, PyQt, and SQLite
New Features: Article Bookmarks, Completion Status, and Search Improvements
Python and MongoDB: Connecting to NoSQL Databases
Brython: Python in Your Browser
pandas Sort: Your Guide to Sorting Data in Python
Python Microservices With gRPC
Python Inner Functions: What Are They Good For?
Qt Designer and Python: Build Your GUI Applications Faster
Python Web Applications: Deploy Your Script as a Flask App
Stochastic Gradient Descent Algorithm With Python and NumPy
How to Use Python: Your First Steps
C for Python Programmers
Make Your First Python Game: Rock, Paper, Scissors!
Sentiment Analysis: First Steps With Python's NLTK Library
NumPy Tutorial: Your First Steps Into Data Science in Python
Python's .append(): Add Items to Your Lists in Place
Python and MySQL Database: A Practical Introduction
Use PyQt's QThread to Prevent Freezing GUIs
The pass Statement: How to Do Nothing in Python
What Is Data Engineering and Is It Right for You?
Bitwise Operators in Python
Real Python's Office Hours: Learn With Python Experts in Real Time
Handling SQL Databases With PyQt: The Basics
np.linspace(): Create Evenly or Non-Evenly Spaced Arrays
PyQt Layouts: Create Professional-Looking GUI Applications
Python enumerate(): Simplify Loops That Need Counters
Python and PyQt: Creating Menus, Toolbars, and Status Bars
PyPy: Faster Python With Minimal Effort
Use Sentiment Analysis With Python to Classify Movie Reviews
Caching in Python Using the LRU Cache Strategy
Fourier Transforms With scipy.fft: Python Signal Processing
Get Started With Django Part 3: Django View Authorization
Python Modulo in Practice: How to Use the % Operator
Python Booleans: Use Truth Values in Your Code
Data Management With Python, SQLite, and SQLAlchemy
Using ggplot in Python: Visualizing Data With plotnine
Python Community Interview With Anthony Shaw
Python 3.9: Cool New Features for You to Try
Python's map(): Processing Iterables Without a Loop
The Python return Statement: Usage and Best Practices
Python Community Interview With David Amos
Python Practice Problems: Get Ready for Your Next Interview
Numbers in Python
Plot With pandas: Python Data Visualization for Beginners
Find & Fix Code Bugs in Python: Debug With IDLE
Common Python Data Structures (Guide)
Python mmap: Improved File I/O With Memory Mapping
Data Version Control With Python and DVC
Python Community Interview With Bruno Oliveira
Pass by Reference in Python: Background and Best Practices
What Are Python Wheels and Why Should You Care?
Customize the Django Admin With Python
Namespaces and Scope in Python
Generative Adversarial Networks: Build Your First Models
Python Packages: Five Real Python Favorites
K-Means Clustering in Python: A Practical Guide
pandas Project: Make a Gradebook With Python & pandas
Learn IP Address Concepts With Python's ipaddress Module
Python import: Advanced Techniques and Tips
Get Started With Django Part 2: Django User Management
Python's reduce(): From Functional to Pythonic Style
The Python heapq Module: Using Heaps and Priority Queues
Hands-On Linear Programming: Optimization With Python
PySimpleGUI: The Simple Way to Create a GUI With Python
Python Keywords: An Introduction
SettingWithCopyWarning in pandas: Views vs Copies
Python Community Interview With Kattni Rembor
Regular Expressions: Regexes in Python (Part 2)
Build Physical Projects With Python on the Raspberry Pi
Python Community Interview With Russell Keith-Magee
Python vs JavaScript for Pythonistas
Python Community Interview With Christopher Bailey
Python eval(): Evaluate Expressions Dynamically
How to Move a Django Model to Another App
Using Python datetime to Work With Dates and Times
Regular Expressions: Regexes in Python (Part 1)
The Python pickle Module: How to Persist Objects in Python
The pandas DataFrame: Make Working With Data Delightful
Sorting Algorithms in Python
How to Provide Test Fixtures for Django Models in Pytest
How to Make an Instagram Bot With Python and InstaPy
Linked Lists in Python: An Introduction
How to Use any() in Python
SimPy: Simulating Real-World Processes With Python
The Python math Module: Everything You Need to Know
Python Scope & the LEGB Rule: Resolving Names in Your Code
How to Do a Binary Search in Python
Using the Python defaultdict Type for Handling Missing Keys
Defining Your Own Python Function
Alexa Python Development: Build and Deploy an Alexa Skill
Python Bindings: Calling C or C++ From Python
The Beginner's Guide to Python Turtle
Introduction to Python SQL Libraries
Null in Python: Understanding Python's NoneType Object
Python Community Interview With Brett Slatkin
Implementing an Interface in Python
Python Command-Line Arguments
Use a Flask Blueprint to Architect Your Applications
Python '!=' Is Not 'is not': Comparing Objects in Python
Python Community Interview With Kelly and Sean of Teaching Python
Scientific Python: Using SciPy for Optimization
Arcade: A Primer on the Python Game Framework
Logistic Regression in Python
Exploring HTTPS With Python
Using pandas and Python to Explore Your Dataset
NumPy, SciPy, and pandas: Correlation With Python
Run Python Versions in Docker: How to Try the Latest Python Release
Python Statistics Fundamentals: How to Describe Your Data
Data Engineer Interview Questions With Python
MicroPython: An Intro to Programming Hardware in Python
pandas: How to Read and Write Files
Python Descriptors: An Introduction
Python Community Interview With Brian Okken
Invalid Syntax in Python: Common Reasons for SyntaxError
Getting Started With Python IDLE
PyCon Africa 2019 (Recap)
Build a Mobile Application With the Kivy Python Framework
Python Community Interview With Al Sweigart
Arduino With Python: How to Get Started
Python sleep(): How to Add Time Delays to Your Code
Python 3.8: Cool New Features for You to Try
Emacs: The Best Python Editor?
Building a Python C Extension Module
Preventing SQL Injection Attacks With Python
How to Use Generators and yield in Python
Getting Started With Async Features in Python
How to Convert a Python String to int
PyGame: A Primer on Game Programming in Python
Python vs C++: Selecting the Right Tool for the Job
MATLAB vs Python: Why and How to Make the Switch
Python args and kwargs: Demystified
PyCharm for Productive Python Development (Guide)
A Guide to Excel Spreadsheets in Python With openpyxl
Your Guide to the CPython Source Code
How to Make a Discord Bot in Python
An Effective Python Environment: Making Yourself at Home
Your Guide to the Python print() Function
What You Need to Know to Manage Users in Django Admin
First Steps With PySpark and Big Data Processing
Understanding the Python Traceback
Digging Deeper Into Django Migrations
NumPy arange(): How to Use np.arange()
Create a Flask Application With Google Login
Real Python at PyCon US 2019
Build a Recommendation Engine With Collaborative Filtering
Using the "or" Boolean Operator in Python
How to Use Redis With Python
Python Community Interview With Katrina Durance
How to Use Python Lambda Functions
Python Community Interview With Marlene Mhangami
How to Make a Twitter Bot in Python With Tweepy
How to Implement a Python Stack
Object-Oriented Programming in Python vs Java
Pointers in Python: What's the Point?
Python Logging: A Stroll Through the Source Code
Unicode & Character Encodings in Python: A Painless Guide
Three Ways of Storing and Accessing Lots of Images in Python
Playing and Recording Sound in Python
Python Community Interview With Bob and Julian of PyBites
How to Use sorted() and .sort() in Python
Defining Main Functions in Python
Python KeyError Exceptions and How to Handle Them
A Beginner’s Guide to the Python time Module
How to Work With a PDF in Python
How to Create an Index in Django Without Downtime
How to Stand Out in a Python Coding Interview
An Intro to Threading in Python
13 Project Ideas for Intermediate Python Developers
How to Build a Python GUI Application With wxPython
Managing Multiple Python Versions With pyenv
Using PyInstaller to Easily Distribute Python Applications
Refactoring Python Applications for Simplicity
Traditional Face Detection With Python
Python Community Interview With Ali Spittel
Reading and Writing Files in Python (Guide)
Supercharge Your Classes With Python super()
The Factory Method Pattern and Its Implementation in Python
The Ultimate List of Data Science Podcasts
Python Development in Visual Studio Code
Python "for" Loops (Definite Iteration)
Jupyter Notebook: An Introduction
Working With Files in Python
Async IO in Python: A Complete Walkthrough
Django Migrations: A Primer
Python Type Checking (Guide)
Modeling Polymorphism in Django With Python
Python Community Interview With Corey Schafer
Make a Location-Based Web App With Django and GeoDjango
A Pythonista's Holiday Wish List
Thonny: The Beginner-Friendly Python Editor
Python Community Interview With Brian Peterson
Sending Emails With Python
Building Serverless Python Apps Using AWS Chalice
Python Community Interview With Emily Morehouse
Continuous Integration With Python: An Introduction
Memory Management in Python
Interactive Data Visualization in Python With Bokeh
Python Community Interview With Kenneth Reitz
Python "while" Loops (Indefinite Iteration)
Writing Comments in Python (Guide)
Setting Up Python for Machine Learning on Windows
Python Community Interview With Michael Kennedy
Practical Text Classification With Python and Keras
Getting Started With Testing in Python
Python, Boto3, and AWS S3: Demystified
Python Community Interview With Mike Grouchy
Splitting, Concatenating, and Joining Strings in Python
Image Segmentation Using Color Spaces in OpenCV + Python
Python Community Interview With Mahdi Yusuf
Absolute vs Relative Imports in Python
Top 10 Must-Watch PyCon Talks
The Best Python Books
Conditional Statements in Python
Python Program Lexical Structure
Python pandas: Tricks & Features You May Not Know
Python Community Interview With Mariatta Wijaya
Sets in Python
The Ultimate Guide to Django Redirects
Advanced Git Tips for Python Developers
Python Community Interview With Mike Driscoll
Dictionaries in Python
Python Code Quality: Tools & Best Practices
Documenting Python Code: A Complete Guide
Fast, Flexible, Easy and Intuitive: How to Speed Up Your pandas Projects
Reading and Writing CSV Files in Python
Generating Random Data in Python (Guide)
Python Histogram Plotting: NumPy, Matplotlib, pandas & Seaborn
Python 3.7: Cool New Features for You to Try
The Ultimate List of Python YouTube Channels
Python Application Layouts: A Reference
Python itertools By Example
Introduction to Python 3
Data Classes in Python 3.7+ (Guide)
Operator and Function Overloading in Custom Python Classes
Pure Python vs NumPy vs TensorFlow Performance Comparison
Python Metaclasses
Pipenv: A Guide to the New Python Packaging Tool
Python Modules and Packages – An Introduction
Look Ma, No for Loops: Array Programming With NumPy
Python Debugging With Pdb
Introduction to Git and GitHub for Python Developers
11 Beginner Tips for Learning Python Programming
Thinking Recursively in Python
Pythonic Data Cleaning With pandas and NumPy
4 Techniques for Testing Python Command-Line (CLI) Apps
Python IDEs and Code Editors (Guide)
Modern Web Automation With Python and Selenium
VIM and Python – A Match Made in Heaven
Setting Up Sublime Text 3 for Full Stack Python Development
Python Basics Exercises: Scopes (Course)
Python Basics Exercises: Dictionaries (Course)
Python Basics Exercises: Installing Packages With pip (Course)
Python Basics Exercises: Lists and Tuples (Course)
Python Basics: Lists and Tuples (Course)
Python Basics Exercises: Functions and Loops (Course)
Python Basics Exercises: Reading and Writing Files (Course)
Python Basics Exercises: Strings and String Methods (Course)
Python Basics Exercises: Modules and Packages (Course)
Python Basics: Modules and Packages (Course)
Python Basics Exercises: Building Systems With Classes (Course)
Python Basics Exercises: Object-Oriented Programming (Course)
Python Basics Exercises: Conditional Logic and Control Flow (Course)
Python Basics: Reading and Writing Files (Course)
Python Basics: Installing Packages With pip (Course)
Python Basics: Object-Oriented Programming (Course)
Python Basics Exercises: File System Operations (Course)
Python Basics: File System Operations (Course)
Python Basics: Dictionaries (Course)
Python Basics: Scopes (Course)
Python Basics: Numbers and Math (Course)
Python Basics: Strings and String Methods (Course)
Python Basics: Conditional Logic and Control Flow (Course)
Python Basics: Functions and Loops (Course)
Python Basics: Finding and Fixing Code Bugs (Course)
Python Basics: Code Your First Python Program (Course)
Mastering Python's Built-in time Module (Course)
Grow Your Python Portfolio With 13 Intermediate Project Ideas (Course)
Pointers and Objects in Python (Course)
Unicode in Python: Working With Character Encodings (Course)
Creating a Discord Bot in Python (Course)
Python Generators 101 (Course)
Getting the Most Out of a Python Traceback (Course)
Parallel Iteration With Python's zip() Function (Course)
A Beginner's Guide to pip (Course)
Convert a Python String to int (Course)
Improve Your Tests With the Python Mock Object Library (Course)
The Python print() Function: Go Beyond the Basics (Course)
Structuring a Python Application (Course)
Inheritance and Composition: A Python OOP Guide (Course)
Arduino With Python: Getting Started (Course)
Comparing Python Objects the Right Way: "is" vs "==" (Course)
Using NumPy's np.arange() Effectively (Course)
Make a 2D Side-Scroller Game With PyGame (Course)
Defining Main Functions in Python (Course)
Implementing a Stack in Python (Course)
How to Work With a PDF in Python (Course)
Playing and Recording Sound in Python (Course)
Using Sets in Python (Course)
Python Modules and Packages: An Introduction (Course)
Exploring Basic Data Types in Python (Course)
Supercharge Your Classes With Python super() (Course)
Python args and kwargs: Demystified (Course)
Sorting Data With Python (Course)
Python Dictionary Iteration: Advanced Tips & Tricks (Course)
Documenting Code in Python (Course)
Variables in Python (Course)
Demystifying Python, Boto3, and AWS S3 (Course)
KeyError Exceptions in Python and How to Handle Them (Course)
Threading in Python (Course)
Thinking Recursively With Python (Course)
Cool New Features in Python 3.8 (Course)
Python Type Checking (Course)
Python Plotting With Matplotlib (Course)
The Python range() Function (Course)
Getting Started With Django: Building a Portfolio App (Course)
Strings and Character Data in Python (Course)
Thonny: A Beginner-Friendly Python Editor (Course)
Debugging in Python With pdb (Course)
Absolute vs Relative Imports in Python (Course)
Lists and Tuples in Python (Course)
Using Python Lambda Functions (Course)
Histogram Plotting in Python: NumPy, Matplotlib, Pandas & Seaborn (Course)
Traditional Face Detection Using Python (Course)
11 Beginner Tips for Learning Python (Course)
Using Dictionaries in Python (Course)
Logging Inside Python (Course)
How to Write Pythonic Loops (Course)
Reading and Writing Files in Python (Course)
Functional Programming in Python (Course)
Python 3's F-Strings: An Improved String Formatting Syntax (Course)