Book Image

Django 1.1 Testing and Debugging

Book Image

Django 1.1 Testing and Debugging

Overview of this book

Bugs are a time consuming burden during software development. Django's built-in test framework and debugging support help lessen this burden. This book will teach you quick and efficient techniques for using Django and Python tools to eradicate bugs and ensure your Django application works correctly. This book will walk you step by step through development of a complete sample Django application. You will learn how best to test and debug models, views, URL configuration, templates, and template tags. This book will help you integrate with and make use of the rich external environment of test and debugging tools for Python and Django applications. The book starts with a basic overview of testing. It will highlight areas to look out for while testing. You will learn about different kinds of tests available, and the pros and cons of each, and also details of test extensions provided by Django that simplify the task of testing Django applications. You will see an illustration of how external tools that provide even more sophisticated testing features can be integrated into Django's framework. On the debugging front, the book illustrates how to interpret the extensive debugging information provided by Django's debug error pages, and how to utilize logging and other external tools to learn what code is doing.
Table of Contents (17 chapters)
Django 1.1 Testing and Debugging
Credits
About the Author
About the Reviewer
Preface
Index

Implementing the Survey results display


The survey application has one major piece that still remains to be implemented: display of the results for a completed survey. What form should this display take? A text-only tally of votes received for each answer for each question in the survey would be easy enough to write, but not very good at communicating results. A graphical representation of the results, such as a pie chart, would be far more effecting in conveying the breakdown of votes.

In this chapter, we will explore a couple of different approaches to implementing a survey results view that incorporates pie charts to display vote distributions. Along the way we'll encounter some difficulties, and see how the Python debugger can be used to help figure out what is going wrong.

Before starting on the implementation of code to display survey results, let's set up some test data to use in testing out the results as we go along. We can use the existing Television Trends survey and simply adjust...