The Evolution of Finger: cleaning up the finger code

Introduction

This is the third part of the Twisted tutorial Twisted from Scratch, or The Evolution of Finger.

In this section of the tutorial, we'll clean up our code so that it is closer to a readable and extendable style.

Write Readable Code

The last version of the application had a lot of hacks. We avoided sub-classing, didn't support things like user listings over the web, and removed all blank lines -- all in the interest of code which is shorter. Here we take a step back, subclass what is more naturally a subclass, make things which should take multiple lines take them, etc. This shows a much better style of developing Twisted applications, though the hacks in the previous stages are sometimes used in throw-away prototypes.