Comments on: Expert Python Programming by Tarek Ziadé – a review of Chapter 2 http://python.genedrift.org/2009/02/06/expert-python-programming-by-tarek-ziade-a-review-of-chapter-2/ a step-by-step guide to create Python applications in bioinformatics Sun, 02 May 2010 04:24:01 +0000 hourly 1 http://wordpress.org/?v=3.1-alpha By: Arthur http://python.genedrift.org/2009/02/06/expert-python-programming-by-tarek-ziade-a-review-of-chapter-2/comment-page-1/#comment-24591 Arthur Sat, 07 Feb 2009 08:53:14 +0000 http://python.genedrift.org/?p=235#comment-24591 Thanks for the review so far, I'm also relatively new to Python (have been using it for slightly over a year now) and thinking about buying the book. Regarding decorators you might want to take a look at how various web frameworks use them. For example, Django has the "login_required" decorator for views, which allows them to be available only for users who are logged in. The decorator goes through the request and checks if the user is authenticated and then either executes the view or redirects to a specified "login-required"-page. Or the "cache_page" decorator for views, which first checks the cache and based on that returns either the cached page or executes the view. CherryPy uses the "exposed" decorator to mark methods which are accessible via the Web: http://tinyurl.com/dmgts8 The Restish example here http://tinyurl.com/9nxo8g also uses decorators to to expose specific functions in a rest interface. Thanks for the review so far, I’m also relatively new to Python (have been using it for slightly over a year now) and thinking about buying the book.

Regarding decorators you might want to take a look at how various web frameworks use them.

For example, Django has the “login_required” decorator for views, which allows them to be available only for users who are logged in. The decorator goes through the request and checks if the user is authenticated and then either executes the view or redirects to a specified “login-required”-page.

Or the “cache_page” decorator for views, which first checks the cache and based on that returns either the cached page or executes the view.

CherryPy uses the “exposed” decorator to mark methods which are accessible via the Web: http://tinyurl.com/dmgts8

The Restish example here http://tinyurl.com/9nxo8g also uses decorators to to expose specific functions in a rest interface.

]]> By: Chris Lasher http://python.genedrift.org/2009/02/06/expert-python-programming-by-tarek-ziade-a-review-of-chapter-2/comment-page-1/#comment-24575 Chris Lasher Fri, 06 Feb 2009 20:51:10 +0000 http://python.genedrift.org/?p=235#comment-24575 Paulo, I sympathize with you. If there's a weak spot in my Python knowledge, it would be metaprogramming techniques including decorators and metaclasses. For a language that "fits your brain", these two techniques are definitely outliers. Paulo, I sympathize with you. If there’s a weak spot in my Python knowledge, it would be metaprogramming techniques including decorators and metaclasses. For a language that “fits your brain”, these two techniques are definitely outliers.

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