Python GUI Programming with Tkinter
Alan D. Moore
- 452 páginas
- English
- ePUB (apto para móviles)
- Disponible en iOS y Android
Python GUI Programming with Tkinter
Alan D. Moore
Información del libro
Find out how to create visually stunning and feature-rich applications by empowering Python's built-in Tkinter GUI toolkit
Key Features
- Explore Tkinter's powerful features to easily design and customize your GUI application
- Learn the basics of 2D and 3D animation in GUI applications.
- Learn to integrate stunning Data Visualizations using Tkinter Canvas and Matplotlib.
Book Description
Tkinter is a lightweight, portable, and easy-to-use graphical toolkit available in the Python Standard Library, widely used to build Python GUIs due to its simplicity and availability. This book teaches you to design and build graphical user interfaces that are functional, appealing, and user-friendly using the powerful combination of Python and Tkinter.
After being introduced to Tkinter, you will be guided step-by-step through the application development process. Over the course of the book, your application will evolve from a simple data-entry form to a complex data management and visualization tool while maintaining a clean and robust design. In addition to building the GUI, you'll learn how to connect to external databases and network resources, test your code to avoid errors, and maximize performance using asynchronous programming. You'll make the most of Tkinter's cross-platform availability by learning how to maintain compatibility, mimic platform-native look and feel, and build executables for deployment across popular computing platforms.
By the end of this book, you will have the skills and confidence to design and build powerful high-end GUI applications to solve real-world problems.
What you will learn
- Implement the tools provided by Tkinter to design beautiful GUIs
- Discover cross-platform development through minor customizations in your existing application
- Visualize graphs in real time as data comes in using Tkinter's animation capabilities
- Use PostgreSQL authentication to ensure data security for your application
- Write unit tests to avoid regressions when updating code
Who this book is for
This book will appeal to developers and programmers who would like to build GUI-based applications. Knowledge of Python is a prerequisite.
Preguntas frecuentes
Información
Improving Data Storage with SQL
- Installing and configuring the PostgreSQL database system
- Structuring data in a database for good performance and reliability
- The basics of SQL queries
- Using the psycopg2 library to connect your program to PostgreSQL
PostgreSQL
Installing and configuring PostgreSQL
sudo -u postgres createuser -sP myusername sudo -u postgres createdb -O myusername mydatabasename
psql -d mydatabasename -U myusername
Connecting with psycopg2
pip install --user psycopg2-binary
SQL and relational database basics
Basic SQL operations
Syntax differences from Python
- SQL is (mostly) case-insensitive: Although it's conventional for readability purposes to type the SQL keywords in all-caps, most SQL implementations are not case-sensitive. There are a few small exceptions here and there, but, for the most part, you can type SQL in whatever case is easiest for you.
- Whitespace is not significant: In Python, new lines and indentation can change the meaning of a piece of code. In SQL, whitespace is not significant and statements are terminated with a semicolon. Indents and new lines in a query are only there for readability.
- SQL is declarative: Python could be described as an imperative programming language: we tell Python what we want it to do by telling it how to do it. SQL is more of a declarative language: we describe what we want, and the SQL engine figures out how to do it.
Defining tables and inserting data
CREATE TABLE musicians (id SERIAL PRIMARY KEY, name TEXT NOT NULL, born DATE, died DATE CHECK(died > born));
- The id column will be an arbitrary row ID. It's type is SERIAL, which means it will be an autoincrementing integer field, and its constraint is PRIMARY KEY, which means it will be used as the unique identifier for the row.
- The name field is of type TEXT, so it can hold a string of any length. Its constraint of NOT NULL means that the NULL values are not allowed in this field.
- The born and died fields are the DATE fields, so they can only hold a date value. The born field has no constraints, but died has a CHECK constraint enforcing that its value must be greater than the value of born for any given row.