Comments on: Get with the program as contextmanager | Completely Different http://jessenoller.com/2009/02/03/get-with-the-program-as-contextmanager-completely-different/ python, programming and other things Thu, 11 Feb 2010 00:42:02 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: bestchai http://jessenoller.com/2009/02/03/get-with-the-program-as-contextmanager-completely-different/comment-page-1/#comment-139159 bestchai Fri, 16 Oct 2009 20:16:02 +0000 http://jessenoller.com/?p=461#comment-139159 "This makes it so that when we call it on line 20 in Listing 5, we get the reference to the queue we need." should be line 18. “This makes it so that when we call it on line 20 in Listing 5, we get the reference to the queue we need.” should be line 18.

]]> By: bestchai http://jessenoller.com/2009/02/03/get-with-the-program-as-contextmanager-completely-different/comment-page-1/#comment-123070 bestchai Fri, 16 Oct 2009 15:16:02 +0000 http://jessenoller.com/?p=461#comment-123070 "This makes it so that when we call it on line 20 in Listing 5, we get the reference to the queue we need." should be line 18. “This makes it so that when we call it on line 20 in Listing 5, we get the reference to the queue we need.” should be line 18.

]]> By: Yassen Damyanov http://jessenoller.com/2009/02/03/get-with-the-program-as-contextmanager-completely-different/comment-page-1/#comment-66926 Yassen Damyanov Mon, 02 Mar 2009 13:17:22 +0000 http://jessenoller.com/?p=461#comment-66926 A very helpful article! Thanks a lot, Jessen. A very helpful article! Thanks a lot, Jessen.

]]> By: Loris http://jessenoller.com/2009/02/03/get-with-the-program-as-contextmanager-completely-different/comment-page-1/#comment-64478 Loris Sat, 07 Feb 2009 10:44:53 +0000 http://jessenoller.com/?p=461#comment-64478 very good article!<br>thank of lot very good article!
thank of lot

]]> By: Ed Page http://jessenoller.com/2009/02/03/get-with-the-program-as-contextmanager-completely-different/comment-page-1/#comment-64006 Ed Page Tue, 03 Feb 2009 18:41:08 +0000 http://jessenoller.com/?p=461#comment-64006 The concept behind the design of contextlib.contextmanager changed the way I write Python. I don't do this too much but I found the concept of splitting a function up with yields a great way to take a process that is fairly linear but due to language/library design gets split up and becomes harder to read.<br><br>I've created submodes for a command interpreter that are managed by a class that is created when decorating a yield-ing function to have setup and tear down code.<br><br>I've created decorators to work with PyGTK's idle handler for cooperative threading. So instead of having separate functions for each step of the idle processing or using a hand made statemachine just to be in the correct section of code, you just writ your algorithm normally and insert yields when you want to hand control back to GTK<br><br>I'm working on one (untested) that will let you do your PyGTK setup code in the UI thread, background processing in a random thread, and then cleanup code in the UI thread.<br><br>Oh, and another good example of the with statement beyond resource work is a python recipe for unit testing that I saw. Basically you do "with expected(ExceptionType)" and if that exception isn't thrown, the test will fail. The concept behind the design of contextlib.contextmanager changed the way I write Python. I don't do this too much but I found the concept of splitting a function up with yields a great way to take a process that is fairly linear but due to language/library design gets split up and becomes harder to read.

I've created submodes for a command interpreter that are managed by a class that is created when decorating a yield-ing function to have setup and tear down code.

I've created decorators to work with PyGTK's idle handler for cooperative threading. So instead of having separate functions for each step of the idle processing or using a hand made statemachine just to be in the correct section of code, you just writ your algorithm normally and insert yields when you want to hand control back to GTK

I'm working on one (untested) that will let you do your PyGTK setup code in the UI thread, background processing in a random thread, and then cleanup code in the UI thread.

Oh, and another good example of the with statement beyond resource work is a python recipe for unit testing that I saw. Basically you do “with expected(ExceptionType)” and if that exception isn't thrown, the test will fail.

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