Book Image

Tkinter GUI Programming by Example

Book Image

Tkinter GUI Programming by Example

Overview of this book

Tkinter is a modular, cross-platform application development toolkit for Python. When developing GUI-rich applications, the most important choices are which programming language(s) and which GUI framework to use. Python and Tkinter prove to be a great combination. This book will get you familiar with Tkinter by having you create fun and interactive projects. These projects have varying degrees of complexity. We'll start with a simple project, where you'll learn the fundamentals of GUI programming and the basics of working with a Tkinter application. After getting the basics right, we'll move on to creating a project of slightly increased complexity, such as a highly customizable Python editor. In the next project, we'll crank up the complexity level to create an instant messaging app. Toward the end, we'll discuss various ways of packaging our applications so that they can be shared and installed on other machines without the user having to learn how to install and run Python programs.
Table of Contents (18 chapters)
Title Page
Copyright and Credits
Packt Upsell
Contributors
Preface
Index

The sqlite3 module


SQLite is a database technology which comes included with Python, via the sqlite3 module. It works by creating a file on the user's filesystem which is then altered using basic SQL syntax.

Since data stored in a SQLite database is stored on disk, it can be used as a form of permanent storage for web and GUI applications.

Using sqlite in Python is as easy as importing the built-in sqlite3 module and then sending it several SQL queries.

We will be using sqlite to store some data about our chat application on the server. Let's have an introduction to sqlite by creating data storage for the users of our chat application.

Creating a database and table

Inside your server folder, create a new Python file named create_database.py and add the following code:

import sqlite3

database = sqlite3.connect("chat.db")
cursor = database.cursor()

create_users_sql = "CREATE TABLE users (username TEXT, real_name TEXT)"
cursor.execute(create_users_sql)

database.commit()
database.close()

After importing...