PyQt

PyQt is a Python binding of the cross-platform GUI toolkit Qt. Applications built with PyQt will run on any platform supported by Qt & Python including Windows, OS X, Linux, iOS and Android.

Created by Riverbank Computing, PyQt is free software (GPL licensed) and has been in development since 1999. PyQt5 was released in 2016 and last updated in October 2021.

For a complete guide to desktop application development with Python & PyQt, see the PyQt5 tutorial and my PyQt5 book Create Simple GUI Applications with Python & Qt.

Explore PyQt

Showing articles for All (278) PyQt6 (89) PySide6 (5) PyQt5 (97) Streamlit (0) Tkinter (0) PySide2 (3) Kivy (0)
PyQt6

Opening a subwindow from a button event

How to open a second window from a button click using PyQt6 and Qt Designer .ui files
PyQt6

Packaged installer file sizes for PyQt apps

Understanding and reducing the size of Python GUI application installers
PyQt6

QDialog blocking main thread?

Understanding why QDialog.exec() blocks your application and how to fix it
PyQt6

QWebEngine in Qt Designer

How to use QWebEngineView and other custom widgets in your Qt Designer layouts
PyQt5

Updating progressbar from QRunner

Published 11.05.2020

Using Qt Designer .ui Files with fbs for PyQt5 Packaging

Load your Qt Designer interfaces directly in fbs-based applications without converting to Python

Why are signals defined as class variables?

Understanding why PyQt6 and PySide6 signals live on the class, not in __init__
PyQt6

Clearing the canvas in QPainter

Fix the common black background issue when painting on a QPixmap in PyQt6
PyQt6

Elegant shutdown of running threads

How to gracefully shut down QThreadPool workers when closing your PyQt application
PyQt6

How to start/stop or pause running threads?

Control QRunnable workers in PyQt6 with start, stop, and pause functionality
PyQt5

Pause a running worker thread

Put a running task on hold, waiting for the UI

What does @pyqtSlot() do?

Is the pyqtSlot decorator even necessary?
PyQt6

Understanding QPainter Coordinates in PyQt6

How the coordinate system works for drawing on canvases in PyQt6
PyQt5

How to Pass Additional Arguments to a QRunnable Worker Function

Solving common errors when passing parameters to threaded Worker functions in PyQt5
PyQt6

Resizing the QPainter canvas

How to make a QLabel drawing canvas resize with the window
PyQt5

Why Omitting "if role == Qt.DisplayRole" Makes Your QAbstractTableModel Look Strange

Understanding Qt roles and why your table suddenly shows checkboxes, checkmarks, and filled squares

How to Check if a QLineEdit is Empty in Python

Empty strings are falsey in Python
PyQt5

How to Add Custom Widgets to Qt Designer

Use widget promotion to integrate your own Python widgets into Qt Designer layouts
PyQt5

Customizing the Size of a PyQtGraph Plot

Control where and how large your PyQtGraph plots appear in your PyQt5 application
PyQt6

ModelView Autoselection

How to automatically select items in a QListView using setCurrentIndex and QModelIndex
PyQt5

Plotting time series data with PyQtGraph

Display datetime data on PyQtGraph plot axes, including when using Qt Designer
PyQt6

Fixing "ModuleNotFoundError No module named PyQt6" when packaging with PyInstaller

Why PyInstaller can't find PyQt6 and how to fix it

Problem showing a widget (not Window)

Published 07.05.2020
PyQt5

PyQtGraph errors in Spyder/IPython

Fixing common PyQtGraph color, font size, and compatibility issues
PyQt6

Fixing "No module named plotwidget" when using PyQtGraph with Qt Designer

How to correctly promote a widget to PyQtGraph's PlotWidget in your .ui files
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