Everand Logo

Welcome to Everand!

  • Discover millions of ebooks, audiobooks, and so much more with a free trial

    From $11.99/month after trial. Cancel anytime.

    PyQt6 101: A Beginner’s guide to PyQt6
    PyQt6 101: A Beginner’s guide to PyQt6
    PyQt6 101: A Beginner’s guide to PyQt6
    Ebook272 pages1 hour

    PyQt6 101: A Beginner’s guide to PyQt6

    By Edward Chang

    ()

    Read preview

    About this ebook

    This book presents a concise, accessible introduction to PyQt6. It will: show you the rungs using simple, up-to-date scripts, explain all the basics you need to get started, avoid all the dull theory, and, slowly guide you to more advanced scripts. It is perfect for the beginner who just wants to dabble and will serve as a motivator for further exploration for those interested in longer term use of PyQt6.

    LanguageEnglish
    PublisherEdward Chang
    Release dateJul 23, 2024
    ISBN9798224056675
    PyQt6 101: A Beginner’s guide to PyQt6

    Related to PyQt6 101

    Related ebooks

    Programming For You

    View More
    View More

    Related podcast episodes

    Related articles

    • UNLIMITED

      Create Smaller Sized Apps With React

      Nov 19, 2019

      You may not be surprised that some developers have criticised Electron (see tutorials LXF256), mostly regarding the memory usage of its final binaries. The initial binary is over 100MB, because a major chunk of code from Chrome is embedded. When you

      6 min read

    • UNLIMITED

      Join the Pod, Man!

      May 30, 2023

      Join the Pod, Man!
      8 min read

    • UNLIMITED

      The Body Syntonic

      Aug 23, 2022

      The Body Syntonic
      4 min read

    • UNLIMITED

      Code A Cataloguing Application In Python

      Nov 15, 2022

      Credit: www.djangoproject.com Matt Holder has been a fan of the open source methodology for over two decades and uses Linux and other tools where possible. More featurepacked source code for this project can be downloaded from https://github.com/mat

      8 min read

    • UNLIMITED

      Yarp: A Similar Framework

      Jan 12, 2021

      YARP is the framework for communications within robotics. It can replace the ROS master as a name server. You can also do this the other way around using the YARP as a name server. The name server will support the nodes and protocols across your syst

      1 min read

    • UNLIMITED

      Write A Linux Shell From Scratch

      Dec 12, 2023

      Part One! Don’t miss next issue, subscribe on page 16! Ferenc Deak wanted to use Malbolge to create a Linux shell, but after several days in hell, he quickly came to his senses and continued the project in C++. Not that there is a huge difference… E

      9 min read

    • UNLIMITED

      Code An Admin Back-end In Django

      Dec 13, 2022

      Credit: www.djangoproject.com OUR EXPERT Matt Holder has been a fan of the open source methodology for over two decades and uses Linux and other tools where possible. More featurepacked source code for this project can be downloaded from https://

      6 min read

    • UNLIMITED

      Mind Your Language!

      Apr 4, 2023

      Mind Your Language!
      9 min read

    • UNLIMITED

      FLASK Web Frameworks

      Jun 4, 2019

      The main focus of Python has always been to get you cracking on with your coding – the language was never made for web programming. However, this has just made it more interesting to extend the language for the web, or to create an interface to web-b

      9 min read

    • UNLIMITED

      Discover Easy-to -build Desktop Apps

      Oct 22, 2019

      Electron is actually a browser packaged with node.js and a few APIs. Because it’s built on top of the Chromium browser, you have everything available from there to add to your application. GitHub developed it as part of the Atom editor; it was open-s

      7 min read

    • UNLIMITED

      Mark Your Media Files

      Nov 17, 2020

      When using an embedded system as a media centre, you need to know about NFO files. The files keep track of the meta data for your titles. They’re XML files that contain information on the song, movie or other media that you’re accessing. For example,

      6 min read

    • UNLIMITED

      Observability Of The Kernel And Containers

      Apr 4, 2023

      Mihalis Tsoukalos is currently working on Time Series. You can reach him at: @mactsouk. For our final delve into eBPF, we’re tackling applications, the kernel and Docker containers. At the end of the day, all Linux machines execute code for applicat

      10 min read

    • UNLIMITED

      Visual Studio Code 1.74

      Mar 7, 2023

      Visual Studio Code 1.74
      2 min read

    • UNLIMITED

      Usability

      Oct 19, 2021

      Usability
      3 min read

    • UNLIMITED

      Do Docker Like An Adult!

      Feb 6, 2024

      In the world of ephemeral services, Docker images provide a great way to have disposable I services on a ‘quick in, quick out’ scenario. With that ease of use, bad practice can creep in. Here we’re discussing some of the ways to optimise production u

      4 min read

    • UNLIMITED

      Are Docker Containers a Good Idea for Laptops?

      Mar 31, 2020

      Docker containers are cool. If you haven’t yet played with Docker, you’re missing a large world of easily deployed applications. For example, I can deploy NodeRed, Plex, Jupyter Lab, and Nextcloud servers, and run them behind a Traefik reverse proxy

      2 min read

    • UNLIMITED

      Revealing The Shell Behind The Shell

      Mar 5, 2024

      Ferenc Deák sees no way back from the C++ mayhem he brought upon readers with this quick and dirty shell, so you just have to accept it. C++. The code for the shell can still be found at https://github. com/fritzone/lxf-shell. In the first three part

      11 min read

    • UNLIMITED

      Node.js Logging

      Mar 10, 2020

      When developing a Node.js application you need to set it for logging and debugging. This happens in your code, and you direct it to standard out. It is always better to direct all logging to standard out and let external tools route and filter where

      1 min read

    • UNLIMITED

      Process Your Smarthome Sensor Data

      Nov 14, 2023

      Part Two! Don’t miss next issue, subscribe on page 16! Matt Holder is an IT professional of 15 years, Linux user for over 20 years, user of plenty of home automation gear and selfprofessed geek. The complete code listing can be downloaded from https

      9 min read

    • UNLIMITED

      Getting To Grips With Docker

      Jan 12, 2021

      Getting To Grips With Docker
      9 min read

    • UNLIMITED

      Manage Your Apps!

      Nov 14, 2023

      Manage Your Apps!
      17 min read

    • UNLIMITED

      Poisoning The Well

      Jan 11, 2022

      Poisoning The Well
      4 min read

    Related categories

    Reviews for PyQt6 101

    0 ratings

    0 ratings0 reviews

    What did you think?

    Tap to rate

    Review must be at least 10 words

      Book preview

      PyQt6 101 - Edward Chang

      Title page

      PyQt6 101

      A Beginner’s guide to PyQt6

      Edward Chang

      Text copyright © 2024 by Edward Chang

      All rights reserved. Without limiting the rights under the copyright reserved above, no part of this publication may be reproduced, stored in, or introduced into a retrieval system, or transmitted in any form or by any means (electronic, mechanical, photocopying, recording, or otherwise) without prior written permission.

      For permission requests, please contact: @thehackeruni

      ISBN-13: 9798224056675

      Table of Contents

      Preface to the 2nd Edition Book source code Preface to the 1st Edition Conventions used Book source code Images 1. Object-oriented Programming Refresher Why OOP? Classes Class methods Object initialisation What is the nature of self? Inheritance Story time Back to class Overriding Multiple Inheritance super()-Man Summary References 2. Your first PyQt programs First example Second example Summary 3. Layout management in PyQt Absolute positioning Layout classes Box layout Grid layout Form layout Summary References 4. Signals and slots Custom slot Using a provided slot A typical example Summary References 5. PyQt widgets QLineEdit QCalendarWidget QCheckBox QSlider QProgressBar QOpenGLWidget Miscellaneous widgets QComboBox QMovie QLabel Summary References 6. FileLister Qt Creator Summary 7. Currency Exchange Rates App Designing the UI Switching back to Python Web service communication Putting it all together Summary References 8. PyQt databases and CSS styling Qt Databases Connecting to the database and querying it Models QsqlQueryModel QsqlTableModel QsqlRelationalTableModel QSqlRelationalDelegate CSS Styling Style Rules Selector Types Sub-Controls Pseudo-States Conflict Resolution Cascading Inheritance Example Summary References 9. Radio App Setting up Gstreamer Pipeline Elements Pads Element states Bringing it all together Explanation of the code Radio app Summary References A. Multi-threading How to implement threading References B. Network Access Manager References C. Using Docker Initial setup Windows Other operating systems D. Python’s __name__ variable

      Preface to the 2nd Edition

      Thanks to the support of my readers, I’m back with the 2nd edition of this book.

      This second edition attempts to bring the original up to date by thorough revision, and, addition of a new chapter that reviews Object-oriented Programming(OOP). Also, running some of the apps in the book has been problematic for some users because of the app dependencies. A Dockerfile that runs all the apps in this book and installs all the required dependencies has been provided.

      Book source code

      Source code for the book can be found at:

      https://gitlab.com/wohlstetter/pyqt6-101-2ndedition

      Preface to the 1st Edition

      I could bore you with a lot of theory about Python, the history of user interface (U.I.) design and so on. But, I trust that you’ll be able to research all the dreary stuff when(if ever!) you need it. Instead, like Neo in the Matrix, we’ll skip all the boring stuff and get right to the meat and potatoes of the subject.

      The only assumptions I make are:

      That you’re acquainted with the basics of Python. You can always refer to:

      https://docs.python.org/3/tutorial/

      if you’re a bit rusty.

      Some experience using the command line interface (CLI) on your operating system.

      Know how to install python modules.

      Basic knowledge of the HTTP protocol.

      Basic knowledge of MySQL databases. A brief overview can be found at:

      https://www.tutorialspoint.com/sql/sql-overview.htm

      A beautifully designed e-book with more details can be found at:

      https://goalkicker.com/SQLBook/

      It also helps to have experience with a visual programming language like Visual Basic, Delphi or mobile phone programming. But, it’s not necessary.

      Conventions used

      There are a number of text conventions used throughout this book.

      Italics: Used for a new term, an important word, or words, function names, variable names, command-line input and code in text. Here is an example:

      Change the button from its default name pushButton to btnBrowse.

      When we wish to draw your attention to a particular part of code or output, the relevant lines or items are set in bold: Review the last minute of the video to see this!

      Book source code

      Source code for the book can be found at:

      https://gitlab.com/wohlstetter/pyqt6-101

      Images

      Some images had to be shrank so they could be displayed in the document. The most important of these can be found in the images folder of the source code.

      As always, happy coding!

      Chapter 1. Object-oriented Programming Refresher

      This chapter is mainly intended for beginner Python coders. Experienced Python coders may skip it.

      I will not exhaustively cover Object-oriented Programming(OOP). I’ll only go over the ideas you need to understand the scripts in this book.

      If you want to follow along, you can create a new text file and paste in the following code. Else, this and all other code will be found in the source code that came with your book. The code for each chapter is in a folder named after that chapter.

      Why OOP?

      Before OOP, there was procedural programming that divided a program into functions and data that these functions manipulated. A program was like a recipe that sequentially manipulated data to produce the result we wanted.

      But as programs grew larger, the overlap between functions and their data often caused unforeseen problems. OOP broke down unwieldy programs into smaller units of related variables and functions called objects. We call these variables attributes and the functions that manipulate them are called methods.

      Classes

      A class is a representation of an object. It is the blueprint from which individual objects are created.

      A simple example of a class can be found in basicexample.py in the folder for this chapter.

        1 class

      exampleClass:

        2   

      A simple example of a class.

       

        3    i =

      5000

      To create an instance of a class, you use function notation. The following creates an instance of exampleClass and returns an object that we assign to a variable named y.

      y = exampleClass()

      Our object has two attributes: an integer and a docstring which we can access as shown below.

      >>> y = exampleClass()

      >>>

      >>> y.i

      5000

       

      >>>

      >>> y.__doc__

      ' A simple example of a class. '

       

      >>>

      Class methods

      Methods are functions within a class that are designed to perform a particular task. Python distinguishes between user-defined methods written by a programmer and special methods that are part of the language.

      These magic methods have a double underscore(dunder) on either side of their name for example: __init__() .

      Object initialisation

      Instantiation i.e. calling a class object gives us an empty object. Setting the initial state of objects in Java and C++ is done using a constructor method. The Python equivalent of this is the __new__() method.

      To see a demonstration of this, open the file called classes101.py in a terminal. One way to do this is by typing the following:

      python3 -i classes101.py

      The code of class classDemo is shown below.

        1 class

      classDemo:

        2   

      def

      __new__(cls, *args, **kwargs):

        3       

      print ('__new__ is the constructor for a class'

      )

        4       

      return

      object.__new__(cls)

        5

        6   

      def

      __init__(self, args):

        7       

      print('__init__ is the initialiser for a class'

      )

        8

        9   

      def

      __del__(self):

       10       

      print('__del__ is the finaliser for a class'

      )

       11

       12   

      def

      greeting(self):

       13       

      print('__new__ or __init__? Now you know what get\'s called first :)')

      When we create an object called x as shown, we get the following:

      >>> x = classDemo('')

      __new__ is the constructor for a class

      __init__ is the initialiser for a class

      __new__() is rarely overridden[1] in Python, so we don’t need to worry about it at this stage. We’ll do all our

      Enjoying the preview?
      Page 1 of 1