PyQt4 window on Ubuntu

In this tutorial you will learn how to create a graphical hello world application with PyQT4.

PyQT4, it is one of Pythons options for graphical user interface (GUI) programming.

Related course:
Practice Python with interactive exercises

PyQt4 window example:

This application will create a graphical window that can be minimized, maximimzed and resized it.

#! /usr/bin/env python
# -*- coding: utf-8 -*-
#
import sys
from PyQt4.QtGui import *
# Create an PyQT4 application object.
a = QApplication(sys.argv)
# The QWidget widget is the base class of all user interface objects in PyQt4.
w = QWidget()
# Set window size.
w.resize(320, 240)
# Set window title
w.setWindowTitle("Hello World!")
# Show window
w.show()
sys.exit(a.exec_())

The PyQT4 module must be immported, we do that with this line:

from PyQt4.QtGui import *

We create the PyQT4 application object using QApplication():

a = QApplication(sys.argv)

We create the window (QWidget), resize, set the tittle and show it with this code:

w = QWidget()
w.resize(320, 240)
w.setWindowTitle("Hello World!")

Don't forget to show the window:

# Show window
w.show()

You can download a collection of PyQt4 examples:   Download PyQT Code (Bulk Collection)