Loading QtDesigner's .ui files in PySide

Question

I am looking for a simple example of how to directly load a QtDesigner generated .ui file into a Python application.

I simply would like to avoid using pyuic4.

score 50 · Answer 1 · answered Aug 17 '13 at 22:11

50

For the complete noobs at PySide and .ui files, here is a complete example:

from PySide import QtCore, QtGui, QtUiTools


def loadUiWidget(uifilename, parent=None):
    loader = QtUiTools.QUiLoader()
    uifile = QtCore.QFile(uifilename)
    uifile.open(QtCore.QFile.ReadOnly)
    ui = loader.load(uifile, parent)
    uifile.close()
    return ui


if __name__ == "__main__":
    import sys
    app = QtGui.QApplication(sys.argv)
    MainWindow = loadUiWidget(":/forms/myform.ui")
    MainWindow.show()
    sys.exit(app.exec_())

answered Aug 17 '13 at 22:11

BarryPye

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Try this @Necronomicron – 101 Dec 10 '14 at 21:03
How can I access UI widgets once I've loaded the UI this way? – texnic Feb 23 '19 at 11:48
Found an answer [here](https://stackoverflow.com/a/20116812/674976): `window = loader.load('filename.ui', parent); my_widget = window.my_widget_name`. – texnic Feb 23 '19 at 22:14

score 39 · Accepted Answer · edited Jun 10 '13 at 16:17

39

PySide, unlike PyQt, has implemented the QUiLoader class to directly read in .ui files. From the linked documentation,

loader = QUiLoader()
file = QFile(":/forms/myform.ui")
file.open(QFile.ReadOnly)
myWidget = loader.load(file, self)
file.close()

edited Jun 10 '13 at 16:17

qasfux

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answered Aug 22 '11 at 13:19

Stephen Terry

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Just to help noobs along: QUiLoader is from `PySide.QtUiTools.QUiLoader` – brews Mar 15 '13 at 18:07
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All I get is this: `QPixmap: Must construct a QApplication before a QPaintDevice Aborted (core dumped)` – Lucio Jun 02 '13 at 03:08
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@Lucio The code snippet in this answer cannot be used in isolation. Follow BarryPye's answer for a complete example. – JBentley May 05 '14 at 20:30

score 6 · Answer 3 · edited May 23 '17 at 12:32

6

Another variant, based on a shorter load directive, found on https://askubuntu.com/questions/140740/should-i-use-pyqt-or-pyside-for-a-new-qt-project#comment248297_141641. (Basically, you can avoid all that file opening and closing.)

import sys
from PySide import QtUiTools
from PySide.QtGui import *

app = QApplication(sys.argv)
window = QtUiTools.QUiLoader().load("filename.ui")
window.show()
sys.exit(app.exec_())

Notes:

filename.ui should be in the same folder as your .py file.
You may want to use if __name__ == "__main__": as outlined in BarryPye's answer

edited May 23 '17 at 12:32

Community

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answered Jan 26 '16 at 15:45

lofidevops

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This one actually works with PySide2. Just add `from PySide2.QtWidgets import QApplication` – texnic Feb 23 '19 at 10:52

score 0 · Answer 4 · edited Apr 24 '21 at 07:38

Here is some example for PySide6 and Windows. (For linux you need use /, not \\)

from PySide6.QtUiTools import QUiLoader
from PySide6.QtCore import QFile
from PySide6.QtWidgets import QApplication
import sys

if __name__ == "__main__":
    app = QApplication(sys.argv)
    loader = QUiLoader()
    file = QFile("gui.ui")
    file.open(QFile.ReadOnly)
    ui = loader.load(file)
    file.close()
    ui.show()
    sys.exit(app.exec_())

Loading QtDesigner's .ui files in PySide

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