Python 3 for Absolute Beginners

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As you’ve seen, text is integral to most Python programs, and you saw how often of our examples use it. We take text input from users, manipulate that text, and display messages in response. This is why Python comes with so many text-related features. In this chapter, you learned how to split and join strings; format, edit, and search for strings; use regular expressions to search for patterns within strings; and work with the files on your file system. We then applied much of this in our example application. 160 C H A P T E R 8 ? ? ? Executable Files, Organization, and Python on the Web Up to this point, you’ve been running your scripts via the python interpreter. This is all well and good, but it would be nice if we could get the scripts to run by themselves, just like real programs, so that’s just what we'll look at first. I’ll then cover how to organize and spruce up your code, because clean, organized code makes you more efficient and gives you time to write even more lovely Python code. This leads us onto some of the dynamic features of Python: modules and the exec() and eval() functions. These features give you more flexibility and choice when writing Python applications.
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About the author

Tim Hall currently provides front-line support for 64 Studio. He has also written newbie tutorials for Linux User and Developer magazine in between more mundane system admin and web authoring jobs. Tim has released albums and performed as a musician and songwriter, both solo and in collaboration with other artists. He has been further honored as the holder of the Bardic chair of Glastonbury between 2005 and 2007. Tim uses Python as his main programming language, primarily as a means for creative ends, because it is easy to read and fun to learn.
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Published on
Mar 10, 2010
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Computers / Programming / General
Computers / Programming Languages / General
Computers / Programming Languages / Python
Computers / Software Development & Engineering / General
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The 3rd edition of PACES for the MRCP has been fully revised and updated throughout to retain its pole position as the textbook to accompany core medical training (CMT) and prepare candidates for success in the Practical Assessment of Clinical Examination Skills and a future specialty career.


Fully revised for the new Station 5 and completely updated throughout.

Promotes understanding and deeper learning of modern medicine applicable to PACES and the specialist registrar.

Emphasis on clinical assessment – history-taking, examination and communication skills – equipping candidates with appropriate differential diagnoses from which to develop the right diagnosis.

Encourages candidates to question why a diagnosis has arisen and consider its consequences. For example, ‘Heat failure’ is a not a diagnosis until a candidate has considered the differential diagnoses of breathlessness and decided why heart failure is most likely, and then considered its cause (not always ischaemic heart disease), its presentation (acute, chronic, left or right ventricular or both) and, most importantly, the effects of it and its treatments on a patient’s life.

This 3rd edition of PACES for the MRCP continues to provide fully revised, up-to-date, evidence-based coverage of investigations and treatments. Whilst the emphasis of PACES is on clinical skills, candidates who understand when, for example, a patient with rheumatoid arthritis might benefit from a biologic agent and how this will influence inflammatory disease, is better equipped for success.

A one-volume text giving candidates complete preparation for the PACES exam within one portable volume250 cases organised into the 5 stations of the PACES exam – respiratory and abdominal system, history taking, cardiovascular and nervous system, communication and ethics and skin, locomotion, eyes and endocrine systemsEngaging question-and-answer approach at the end of each case – excellent preparation for the examBoxed tips highlight vital information – helps identify what is most important to rememberProduced in full colour throughoutColour coding for each station Many more illustrations added - now over 300 clinical photographs and line drawings in colourMany more cases added, bringing the number up to 250 - 50 per stationHistory-taking and communication skills stations now revised so that they exactly mimic the requirements of the exam
This in-depth resource teaches you to craft mechanics that generate challenging, enjoyable, and well-balanced gameplay. You’ll discover at what stages to prototype, test, and implement mechanics in games and learn how to visualize and simulate game mechanics in order to design better games. Along the way, you’ll practice what you’ve learned with hands-on lessons. A free downloadable simulation tool developed by Joris Dormans is also available in order to follow along with exercises in the book in an easy-to-use graphical environment.

In Game Mechanics: Advanced Game Design, you’ll learn how to:

* Design and balance game mechanics to create emergent gameplay before you write a single line of code.
* Visualize the internal economy so that you can immediately see what goes on in a complex game.
* Use novel prototyping techniques that let you simulate games and collect vast quantities of gameplay data on the first day of development.
* Apply design patterns for game mechanics—from a library in this book—to improve your game designs.
* Explore the delicate balance between game mechanics and level design to create compelling, long-lasting game experiences.
* Replace fixed, scripted events in your game with dynamic progression systems to give your players a new experience every time they play.

"I've been waiting for a book like this for ten years: packed with game design goodness that tackles the science without undermining the art."
--Richard Bartle, University of Essex, co-author of the first MMORPG

“Game Mechanics: Advanced Game Design by Joris Dormans & Ernest Adams formalizes game grammar quite well. Not sure I need to write a next book now!”
-- Raph Koster, author of A Theory of Fun for Game Design.
The Complete Guide to Writing More Maintainable, Manageable, Pleasing, and Powerful Ruby Applications

Ruby’s widely admired ease of use has a downside: Too many Ruby and Rails applications have been created without concern for their long-term maintenance or evolution. The Web is awash in Ruby code that is now virtually impossible to change or extend. This text helps you solve that problem by using powerful real-world object-oriented design techniques, which it thoroughly explains using simple and practical Ruby examples.

Sandi Metz has distilled a lifetime of conversations and presentations about object-oriented design into a set of Ruby-focused practices for crafting manageable, extensible, and pleasing code. She shows you how to build new applications that can survive success and repair existing applications that have become impossible to change. Each technique is illustrated with extended examples, all downloadable from the companion Web site,

The first title to focus squarely on object-oriented Ruby application design, Practical Object-Oriented Design in Ruby will guide you to superior outcomes, whatever your previous Ruby experience. Novice Ruby programmers will find specific rules to live by; intermediate Ruby programmers will find valuable principles they can flexibly interpret and apply; and advanced Ruby programmers will find a common language they can use to lead development and guide their colleagues.

This guide will help you

Understand how object-oriented programming can help you craft Ruby code that is easier to maintain and upgrade Decide what belongs in a single Ruby class Avoid entangling objects that should be kept separate Define flexible interfaces among objects Reduce programming overhead costs with duck typing Successfully apply inheritance Build objects via composition Design cost-effective tests Solve common problems associated with poorly designed Ruby code

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