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Python GUI Programming with Tkinter, 2nd edition

Python GUI Programming with Tkinter, 2nd edition

By : D. Moore
4.3 (34)
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Python GUI Programming with Tkinter, 2nd edition

Python GUI Programming with Tkinter, 2nd edition

4.3 (34)
By: D. Moore

Overview of this book

Tkinter is widely used to build GUIs in Python due to its simplicity. In this book, you’ll discover Tkinter’s strengths and overcome its challenges as you learn to develop fully featured GUI applications. Python GUI Programming with Tkinter, Second Edition, will not only provide you with a working knowledge of the Tkinter GUI library, but also a valuable set of skills that will enable you to plan, implement, and maintain larger applications. You’ll build a full-blown data entry application from scratch, learning how to grow and improve your code in response to continually changing user and business needs. You’ll develop a practical understanding of tools and techniques used to manage this evolving codebase and go beyond the default Tkinter widget capabilities. You’ll implement version control and unit testing, separation of concerns through the MVC design pattern, and object-oriented programming to organize your code more cleanly. You’ll also gain experience with technologies often used in workplace applications, such as SQL databases, network services, and data visualization libraries. Finally, you’ll package your application for wider distribution and tackle the challenge of maintaining cross-platform compatibility.
Table of Contents (22 chapters)
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19
Other Books You May Enjoy
20
Index
Appendices

Implementing read and update in the model

Our entire design up to this point has been centered around a form that only appends data to a file; adding read and update capabilities is a fundamental change that will touch nearly every portion of the application.

It may seem like a daunting task, but by taking it one component at a time, we'll see that the changes are not so overwhelming.

The first thing we should do is update our documentation. Open the abq_data_entry_spec.rst file in the docs folder, and let's start with the Requirements section:

Functional Requirements:
  * Provide a UI for reading, updating, and appending 
    data to the CSV file
  * ...

And, of course, we should also update the part that is not required, like so:

The program does not need to:
  * Allow deletion of data.

Now, it's a simple matter of making the code match with the documentation. Let's get started!

Adding read and update to the CSVModel class

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