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Python GUI Programming Cookbook, Second Edition

You're reading from Python GUI Programming Cookbook, Second Edition Use recipes to develop responsive and powerful GUIs using Tkinter

Product type Paperback

Published in May 2017

Publisher Packt

ISBN-13 9781787129450

Length 444 pages

Edition 2nd Edition

Languages

Python

Tools

Matplotlib

Concepts

GUI Application Development

Author (1):

Burkhard Meier

View More author details

Table of Contents (12) Chapters

Preface

1. Creating the GUI Form and Adding Widgets FREE CHAPTER

2. Layout Management

3. Look and Feel Customization

4. Data and Classes

5. Matplotlib Charts

6. Threads and Networking

7. Storing Data in our MySQL Database via our GUI

8. Internationalization and Testing

9. Extending Our GUI with the wxPython Library

10. Creating Amazing 3D GUIs with PyOpenGL and PyGLet

11. Best Practices

Using the SQL DELETE command

In this recipe, we will use the SQL DELETE command to delete the data we created in the previous recipe, Using the SQL UPDATE command.

While deleting data might at first sight sound trivial, once we get a rather large database design in production, things might not be that easy any more.

Because we have designed our GUI database by relating two tables via a primary to foreign key relation, when we delete certain data, we do not end up with orphan records because this database design takes care of cascading deletes.

Getting ready

This recipe uses the MySQL database, tables, as well as the data inserted into those tables from the previous recipe, Using the SQL UPDATE command. In order to demonstrate how to create orphan records, we will have to change the design of one of our database tables.

How to do it…

We kept our database design simple by using only two database tables.

While this works when we delete data, there is always a chance of ending up with orphan records...

The rest of the chapter is locked

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Authors (1)

Burkhard Meier

Burkhard Meier

Burkhard Meier is a professional software test automation designer, developer, and analyst. He has more than 17 years' professional experience working for several software companies in California, USA. He is the author of Python GUI Programming Cookbook, First and Second Edition. This book is also available as a Packt video course. He is also the author of the Python Projects Packt video course. In his professional career, he developed advanced in-house testing frameworks written in Python 3. He also developed advanced test automation GUIs in Python, which highly increased the productivity of the software development testing team. When not dreaming in Python code, he reads programming books about design, likes to go for long walks, and reads classical poetry.

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