Book Image

MySQL for Python

By : Albert Lukaszewski
Book Image

MySQL for Python

By: Albert Lukaszewski

Overview of this book

Python is a dynamic programming language, which is completely enterprise ready, owing largely to the variety of support modules that are available to extend its capabilities. In order to build productive and feature-rich Python applications, we need to use MySQL for Python, a module that provides database support to our applications. Although you might be familiar with accessing data in MySQL, here you will learn how to access data through MySQL for Python efficiently and effectively.This book demonstrates how to boost the productivity of your Python applications by integrating them with the MySQL database server, the world's most powerful open source database. It will teach you to access the data on your MySQL database server easily with Python's library for MySQL using a practical, hands-on approach. Leaving theory to the classroom, this book uses real-world code to solve real-world problems with real-world solutions.The book starts by exploring the various means of installing MySQL for Python on different platforms and how to use simple database querying techniques to improve your programs. It then takes you through data insertion, data retrieval, and error-handling techniques to create robust programs. The book also covers automation of both database and user creation, and administration of access controls. As the book progresses, you will learn to use many more advanced features of Python for MySQL that facilitate effective administration of your database through Python. Every chapter is illustrated with a project that you can deploy in your own situation.By the end of this book, you will know several techniques for interfacing your Python applications with MySQL effectively so that powerful database management through Python becomes easy to achieve and easy to maintain.
Table of Contents (20 chapters)
MySQL for Python
Credits
About the Author
About the Reviewers
Preface
Index

Project: Implement HAVING


For the project of this chapter, we will introduce support for HAVING under sorting in our basic database administration web application. Basically, a full-fledged web-based administration application should have support for JOIN and, to a certain extent, subqueries. However, this functionality will be left for room to grow.

The goals of this project are straightforward:

  • Implement support for HAVING in the Python back-end of the application

  • Code the HTML front-end to allow HAVING in conjunction with sorting

When we are done, we will also look at some ways that this application could (and should) be dressed up.

Revising the Python backend

Before implementing a user interface for any functionality, one naturally needs to code support into the program itself. In the case of HAVING, we need to do the following in pymyadmin.py:

  • Revise the qaction function to insert HAVING into the MySQL statement that it passes to execute()

  • Revise the qaction function call in main()

  • Code support...