Setting QWidget size

Rodrigo de Salvo Braz rodrigobraz at
Thu Apr 22 22:22:39 BST 2021

Hi Rich,

It seems your object 'bio' is not being used after creation so it won't
have an effect.

I've changed your code to subclass from QMainWindow, and added a statement
self.setCentralWidget(container), and it now seem to be doing what you
want. Please let me know if that's not true.


#!/usr/bin/env python3

import sys

from PyQt5 import QtWidgets as qtw
from PyQt5 import QtGui as qtg
from PyQt5 import QtCore as qtc
from PyQt5.QtWidgets import QMainWindow

class TestWindow(QMainWindow):
    def __init__(self):
        bio = qtw.QWidget(windowTitle='Test', width = 800, height = 600)

        # Layout
        container = qtw.QWidget(self)
        group1 = qtw.QGridLayout()

        savebutton = qtw.QPushButton('Save')
        group1.addWidget(savebutton, 0, 0)

        cancelbutton = qtw.QPushButton('Cancel')
        group1.addWidget(cancelbutton, 0, 1)


    # Methods
    def save(self):

    def cancel(self):

if __name__ == '__main__':
    app = qtw.QApplication(sys.argv)
    bio = TestWindow()

On Thu, Apr 22, 2021 at 1:06 PM Rich Shepard <rshepard at>

> Looking in my two PyQt5 books and on the Web I'm not seeing how to
> successfully set a QWidget main window's size. Test code attached.
> The overall application will use a QMainWindow with a QTabWidget.
> Individual
> pages have a QWidget as the container (unless my understanding is flawed).
> I've tried to add width and height to the attached and it loads
> without error, but as a very small window. My readings and web searches
> haven't let me find the proper syntax to set a default initial window size
> for each tab's contant to 800x600 (unless they need to be smaller to fit on
> the QTabWidget in a QMainWindow.
> I've also tried qtc.QSize(800,600) without success.
> What's the proper syntax to open the test application at a size of 800x600?
> TIA,
> Rich
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