Download e-book for kindle: Foundations of Agile Python Development by Jeff Younker

By Jeff Younker

The agile improvement move represents the newest advances in instruments and strategies meant to spice up developer productiveness. Programming language-agnostic, this circulate is taking pictures the eye of builders of all disciplines, and is especially usual in state-of-the-art open resource groups resembling Python and Ruby.

This is the 1st publication to use those wanted rules to Python builders, introducing either the instruments and methods outfitted and supported through the Python neighborhood. Authored by means of Jeff Younker, a well known member of Python's agile neighborhood who's maybe top recognized for his construction of a well-liked Python checking out framework, this ebook is bound to be a success between readers who could have reached their limits of data concerning the Python language, but are searching for to enhance their realizing of the way sound procedures can strengthen productiveness to exceptional heights.

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As such, they can be done with the assistance of tools. Most IDEs these days include tools to help with refactoring. The tools are much better established in statically typed languages, since 11 12 CHAPTER 1 ■ WHAT IS AGILE DEVELOPMENT? more of the structure and semantics of the code can be inferred, but tools for Python are getting better. Eclipse running Pydev, which I’ll show you in Chapter 2, has some of the best refactoring tools available for Python. The presence of automatic refactorings is one of the primary reasons for switching to an IDE; this alone nearly drove me to abandon Emacs for Eclipse.

Compare this with long-term estimates. The causes of inaccuracies are likely to have happened months ago. It will be hard to remember them when trying to learn how to estimate for the next project. You’re not going to get many opportunities to learn how to estimate either. Many unforeseen events are likely to happen over the course of the new estimates, too. On a one-year project, it’s likely that someone on your team may meet the love of their life, have a midlife crisis, or have a close relative die.

On a ten-month project, a 20 percent underestimate is a two-month delay. This is the difference between finishing at Halloween and being stuck at work for Thanksgiving, Hanukkah, Christmas, and New Year. Agile projects make short-term estimates. On a two-week iteration, a 20 percent underestimate is only two work days. After the iteration is done, you get to produce another set of estimates. The causes of your delays will have happened days ago. The events that are going to happen in the next few weeks are likely to be known.

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