FAQ

Common Python GUI Questions, Answered

Answers to our users most frequently answered questions, from licensing, packaging and libraries, to PyQt tips and tricks.

Showing articles for All (297) PyQt6 (109) PySide6 (107) PyQt5 (275) Streamlit (103) Tkinter (104) PySide2 (114) Kivy (103)
PyQt5

Opening a subwindow from a button event

Published 11.05.2020
PyQt5

Packaged installer file sizes

Published 11.05.2020
PyQt5

.parent() vs. parent class in PowerBar example

Published 11.05.2020
PyQt5

QDialog blocking main thread?

Published 11.05.2020
PyQt5

QWebEngine in Qt Designer

Published 11.05.2020
PyQt5

Updating progressbar from QRunner

Published 11.05.2020

Using fbs for packaging while creating the GUI with Qt Designer?

Published 11.05.2020
PyQt5

Weather app multiple locations?

Published 11.05.2020

Why are signals defined as class variables?

Published 11.05.2020
PyQt5

Clearing the canvas in QPainter

Published 10.05.2020
PyQt5

Coordinates on `QPainter`

Published 10.05.2020
PyQt5

Elegant shutdown of running threads

Published 10.05.2020
PyQt5

How can you pass additional args to a worker function?

Published 10.05.2020
PyQt5

How to start/stop or pause running threads?

Published 10.05.2020
PyQt5

Painter example Undo/Ctrl-Z

Published 10.05.2020
PyQt5

Pause a running worker thread

Put a running task on hold, waiting for the UI
PyQt5

Resizing the QPainter canvas

Published 10.05.2020
PyQt5

Threading dict not callable error

Published 10.05.2020

What does @pyqtSlot() do?

Is the pyqtSlot decorator even necessary?

What does @Slot() do?

Is the Slot decorator even necessary?
PyQt5

Why did the output on the QAbstractTableModel look so strange when I accidentally omitted "if role == Qt.DisplayRole:"?

Published 09.05.2020

Q&A: How to check if a QLineEdit is empty?

Empty strings are falsey in Python

AttributeError module 'time' has no attribute 'clock'

Using PyQtGraph with Python 3.8
PyQt5

Add widgets in a kind of library show in the QT Designer

Published 07.05.2020
PyQt5

AttributeError: 'MainWindow' object has no attribute 'onWindowTitleChange'

Published 07.05.2020
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