Python GUIs

Sorting and Filtering a QTableView with QSortFilterProxyModel — Learn how to add interactive sorting and filtering to your PyQt/PySide table views without touching your underlying data

Martin Fitzpatrick — Wed, 06 May 2026 06:00:00 +0000

I'm using QTableView to show some data, which works well. But I would like to be able to sort the data by different columns. How can I do this without sorting the data manually?

Streamlit Buttons — Making things happen with Streamlit buttons

Martin Fitzpatrick — Fri, 01 May 2026 06:00:00 +0000

Streamlit is a popular choice for creating interactive web applications in Python. With its simple syntax and intuitive interface, developers can quickly create visually appealing dashboards.

Actions in one thread changing data in another — How to communicate between threads and windows in PyQt6

Martin Fitzpatrick — Wed, 29 Apr 2026 06:00:00 +0000

I have a main window that starts background threads (e.g., handling GPIO data). From the main window I open secondary windows using buttons. When I press a button in a secondary window, I can't change anything in the background threads. But if I press a button in the main window, everything works. How do I communicate between a secondary window and a thread that was started from the main window?

Streamlit Widgets — An Overview of Commonly Used Widgets in Streamlit

Martin Fitzpatrick — Fri, 24 Apr 2026 06:00:00 +0000

Streamlit is a powerful Python library designed to build interactive web apps with minimal code. One of its core features is an extensive collection of widgets that allow users to interact with the app in various ways, such as providing inputs, triggering actions, or visualizing data. Streamlit makes it easy to create these elements with simple, intuitive syntax.

Checkboxes in Table Views with a Custom Model — Show checkboxes for boolean values in PyQt/PySide table views

Martin Fitzpatrick — Wed, 22 Apr 2026 09:00:00 +0000

I have a QTableView with a custom QAbstractTableModel, and I want to add a column of checkboxes. Should I create a custom delegate class for the checkbox, or is there a simpler way to do this?

What does @pyqtSlot() do? — Is the pyqtSlot decorator even necessary?

Martin Fitzpatrick — Mon, 12 Jan 2026 06:00:00 +0000

When working with Qt slots and signals in PyQt6 you will discover the @pyqtSlot decorator. This decorator is used to mark a Python function or method as a slot to which a Qt signal can be connected. However, as you can see in our signals and slots tutorials you don't have to use this. Any Python function or method can be used, normally, as a slot for Qt signals. But elsewhere, in our threading tutorials we do use it.

Getting Started With Flet for GUI Development — Your First Steps With the Flet Library for Desktop and Web Python GUIs

Leo Well — Mon, 15 Dec 2025 06:00:00 +0000

Getting started with a new GUI framework can feel daunting. This guide walks you through the essentials of Flet, from installation and a first app to widgets, layouts, and event handling.

Getting Started With NiceGUI for Web UI Development in Python — Your First Steps With the NiceGUI Library for Web UI Development

Leo Well — Thu, 27 Nov 2025 06:00:00 +0000

NiceGUI is a Python library that allows developers to create interactive web applications with minimal effort. It's intuitive and easy to use. It provides a high-level interface for building modern web-based graphical user interfaces (GUIs) without requiring deep knowledge of web technologies like HTML, CSS, or JavaScript.

Getting Started With DearPyGui for GUI Development — Your First Steps With the DearPyGui Library for Desktop Python GUIs

Leo Well — Wed, 19 Nov 2025 08:00:00 +0000

Getting started with a new GUI framework can feel daunting. This guide walks you through the essentials of DearPyGui—from installation and your first app to widgets, layouts, event handling, and plotting.

Saving and Restoring Application Settings with QSettings in PyQt6 — Learn how to use QSettings to remember user preferences, window sizes, and configuration options between sessions

Martin Fitzpatrick — Thu, 09 Oct 2025 09:00:00 +0000

Most desktop applications need to remember things between sessions. Maybe your user picked a dark theme, resized the window, or toggled a feature on or off. Without a way to save those choices, your app would forget everything the moment it closes. That's where QSettings comes in.

How can I enable editing on a QTableView in PySide6? — Modifying your model to allow editing of your data source

Martin Fitzpatrick — Tue, 19 Aug 2025 06:00:00 +0000

In the Model-Views course, we covered Displaying Tabular Data in Qt ModelViews. This takes a data source, such as a list of lists, a NumPy array, or a Pandas DataFrame, and displays it in a QTableView. But often, displaying is just the first step—you also want your users to be able to add and edit the table, updating the underlying data object.

How can I enable editing on a QTableView in PyQt6? — Modifying your model to allow editing of your data source

Martin Fitzpatrick — Sat, 19 Jul 2025 06:00:00 +0000

6th Edition - Create GUI Applications with Python & Qt, Released — PyQt6 & PySide6 books updated for 2025 with model view controller architecture, new Python/Qt features and more examples

Martin Fitzpatrick — Wed, 11 Jun 2025 08:00:00 +0000

The 6th edition of my book Create GUI Applications with Python & Qt is now available for both PyQt6 and PySide6.

Tkinter Widgets — A walkthrough of Tkinter's basic widgets

Leo Well — Mon, 19 May 2025 06:00:00 +0000

In Tkinter (and most GUI libraries), widget is the name given to a component of the GUI that the user can interact with. User interfaces are made up of multiple widgets arranged within the window to make it functional and intuitive to use.

What does @Slot() do? — Is the Slot decorator even necessary?

Martin Fitzpatrick — Mon, 12 May 2025 06:00:00 +0000

When working with Qt slots and signals in PySide6 you will discover the @Slot decorator. This decorator is used to mark a Python function or method as a slot to which a Qt signal can be connected. However, as you can see in our PySide6 signals and slots tutorial you don't have to use this. Any Python function or method can be used, normally, as a slot for Qt signals. But elsewhere, in our PySide6 multithreading tutorial we do use it.

Build an Image Noise Reduction Tool with Streamlit and OpenCV — Clean up noisy images using OpenCV denoising algorithms in Python

Martin Fitzpatrick — Mon, 05 May 2025 06:00:00 +0000

Image noise is a random variation of brightness or color in images, which can make it harder to discern finer details in a photo. Noise is an artefact of how the image is captured. In digital photography, sensor electronic noise causes random fuzziness over the true image. It is more noticeable in low light, where the lower signal from the sensor is amplified, amplifying the noise with it. Similar noisy artifacts are also present in analog photos and film, but there it is caused by the film grain. Finally, you can also see noise-like artifacts introduced by lossy compression algorithms such as JPEG.

Kivy's Complex Widgets — Learn How to Use Kivy's Complex UX Widgets in Your Apps

Leo Well — Mon, 28 Apr 2025 06:00:00 +0000

Kivy is a powerful framework for developing multi-touch GUI applications using Python. It provides a set of rich built-in widgets which you can use to build complex GUI applications.

Building a Currency Converter Application using Tkinter — Convert between currencies with real-time exchange rates

Khumbo Klein — Fri, 25 Apr 2025 06:00:00 +0000

In this tutorial, you'll create a currency converter application with Python and Tkinter. The app will allow users to select a source currency, choose a target currency, and input the amount to convert. The application will use real-time exchange rates from an external API to perform accurate and up-to-date currency conversions.

Multithreading PyQt6 applications with QThreadPool — Run background tasks concurrently without impacting your UI

Martin Fitzpatrick — Sun, 20 Apr 2025 06:00:00 +0000

A common problem when building Python GUI applications is the interface "locking up" when attempting to perform long-running background tasks. In this tutorial, we'll cover quick ways to achieve concurrent execution in PyQt6 using QThreadPool and QRunnable.

How to Show Only Icons in QTableView Cells (Hide Text) — Use custom model roles to display icons without text in your PyQt6 tables

Martin Fitzpatrick — Sun, 13 Apr 2025 06:52:05 +0000

When you're building a table-based interface with QTableView in PyQt6, you'll often want to show icons in certain cells — for example, a checkmark for True and a cross for False. But by default, Qt will also display the underlying data value as text alongside the icon. That means you end up with something like a green tick next to the word "True", which looks cluttered and unprofessional.

How to Show Only Icons in QTableView Cells (Hide Text) — Use custom model roles to display icons without text in your PySide6 tables

Martin Fitzpatrick — Sun, 13 Apr 2025 06:52:05 +0000

When you're building a table-based interface with QTableView in PySide6 or PyQt6, you'll often want to show icons in certain cells — for example, a checkmark for True and a cross for False. But by default, Qt will also display the underlying data value as text alongside the icon. That means you end up with something like a green tick next to the word "True", which looks cluttered and unprofessional.

PySide6 Toolbars & Menus — QAction — Defining toolbars, menus, and keyboard shortcuts with QAction

Martin Fitzpatrick — Fri, 11 Apr 2025 06:00:00 +0000

Next, we'll look at some of the common user interface elements you've probably seen in many other applications — toolbars and menus. We'll also explore the neat system Qt provides for minimizing the duplication between different UI areas — QAction.

Build a Desktop Sticky Notes Application with PySide6 & SQLAlchemy — Create moveable desktop reminders with Python

Martin Fitzpatrick — Thu, 03 Apr 2025 12:01:00 +0000

Do you ever find yourself needing to take a quick note of some information but have nowhere to put it? Then this app is for you! This virtual sticky notes (or Post-it notes) app allows you to keep short text notes quickly from anywhere via the system tray. Create a new note, paste what you need in. It'll stay there until you delete it.

Getting Started with Streamlit — Build your first Streamlit app and explore some basic features

Martin Fitzpatrick — Wed, 02 Apr 2025 06:00:00 +0000

Streamlit is an open-source Python library that makes it easy to create and share custom web apps for machine learning and data science. In this tutorial we'll take a first look at Streamlit, walking through how to install it, set it up, and build a simple interactive app with Python.

PyQt6 Toolbars & Menus — QAction — Defining toolbars, menus, and keyboard shortcuts with QAction

Martin Fitzpatrick — Sat, 29 Mar 2025 06:00:00 +0000

In this tutorial, we'll look at some of the common user interface elements you've probably seen in many other applications — toolbars and menus. We'll also explore the neat system Qt provides for minimizing the duplication between different UI areas — QAction.