Book Image

Python GUI Programming Cookbook, Second Edition - Second Edition

By : Burkhard Meier
Book Image

Python GUI Programming Cookbook, Second Edition - Second Edition

By: Burkhard Meier

Overview of this book

Python is a multi-domain, interpreted programming language. It is a widely used general-purpose, high-level programming language. It is often used as a scripting language because of its forgiving syntax and compatibility with a wide variety of different eco-systems. Python GUI Programming Cookbook follows a task-based approach to help you create beautiful and very effective GUIs with the least amount of code necessary. This book will guide you through the very basics of creating a fully functional GUI in Python with only a few lines of code. Each and every recipe adds more widgets to the GUIs we are creating. While the cookbook recipes all stand on their own, there is a common theme running through all of them. As our GUIs keep expanding, using more and more widgets, we start to talk to networks, databases, and graphical libraries that greatly enhance our GUI’s functionality. This book is what you need to expand your knowledge on the subject of GUIs, and make sure you’re not missing out in the long run.
Table of Contents (18 chapters)
Title Page
Credits
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

How to get data from a widget


When the user enters data, we want to do something with it in our code. This recipe shows how to capture data in a variable. In the previous recipe, we created several tkinter class variables. They were standalone. Now, we are connecting them to our GUI, using the data we get from the GUI and storing it in Python variables.

Getting ready

We will continue using the Python GUI we were building in Chapter 3, Look and Feel Customization. We'll reuse and enhance the code from GUI_progressbar.py from that chapter.

How to do it…

We will assign a value from our GUI to a Python variable.

Add the following code towards the bottom of our module, just above the main event loop:

    strData = spin.get() 
    print("Spinbox value: " + strData) 

    # Place cursor into name Entry 
    name_entered.focus()       
    #====================== 
    # Start GUI 
    #====================== 
    win.mainloop() 

Running the code gives us the following result:

We will retrieve the current...