Python-digest # 18. News, interesting projects, articles and interviews [March 9, 2014 - March 16, 2014]

Come on the latest news about python and nearby technologies. Interesting videos in Russian about django, articles on how to measure code coverage tests, decorators and trees. In general, everyone will find something interesting.

Thanks to owlman75 for the illustration, as well as to all who send news to the tool for creating digests. There are even spammers> <

It's no secret that I collect news, including from the PythonWeekly and PyCoders mailing lists. This time it was a rather funny situation - we were so good at collecting the news that almost all of the materials from the Friday newsletter were in our previous issue. It looks like PythonWeekly is behind the actual news for a week. In addition, announcements of all materials as they are added are available.
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Articles and Interviews

• Tree in one line
  One-line recursive structure implementations based on defaultdict
• Apply visual effects to images in Django
  
• SVGFig - pure python library for creating SVG
  Brief article-introduction on the use of API interesting project
• Waiting for several different events in Tornado
  
• Code Coverage Levels
  The author asks a question about how to measure how much the code is covered with tests and offers answers to these questions, which he learned from the personal experience and the experience of his colleagues.
• Visitor Design Pattern (Visitor)
  A brief example of the implementation of the popular design pattern.
• Decorators
  Another attempt to clarify what decorators are, this time from Mike Driscoll. Judging by our digest, only a lazy person did not write an article on this topic.
• Real-time audio processing
  The author introduces the principles of operation of the PyAudio module and offers an example of solving one of the sound processing tasks, including using Cython to optimize performance
• IDLE code tab supplement
  The author offers a way to configure IDLE, in which the editor will offer options for auto-completion when you click on the tab when you enter the code
• Nginx log analysis
  Using IPython and statistical modules to get useful data from web server logs
• All about parsing web pages
  Well, not all, of course, but important basic parts and modules are illuminated.
• Transferring the database from sqlite to postgres
  
• Catch any exceptions in wxPython
  Traditionally detailed and complete code examples article about one of the subtle nuances of working with the bindings to the popular graphic toolkit
• Simple parallel code execution with concurrent.futures
  This feature is available from version 3.3, and those who want to simplify their parallel code now (even at 2.7) can once again draw attention to the article we covered in one of the previous issues
• Sublime Text 3 for python, javascript and web developers
  Evangelical article with pictures about the new version of the popular text editor

Video

• Screencasts on django in Russian
  Good screencasts on the django framework in Russian

Books and documentation

• We program in Python
  Publisher Peter advertises the latest edition of the book by Michael Dawson in Russian and recommends it as an ideal tool for beginners to learn Python

Interesting projects, tools, libraries

• growsdk is another attempt to create a CMS managed from the console on the principle of customizability of everything and everything
  
• peepdf - explore pdf
  A library that allows you to study pdf for correctness, the presence of malicious code, the presence of garbage and incorrect data
• bunch - reference to the dictionary as an object
  The author proposes his own solution implementing the reference to the elements of the dictionary type foo ['bar'] in the object style foo.bar with the provided serialization scripts, support for update, iteration, etc.
• Code execution visualization
  An interesting online tool that allows you to see a graphical diagram of step-by-step code execution
• BlitzDB is a pure Python document-oriented database.
  

Releases

• Python 3.3.5
  A bug fixer release - including zipimport regression, a problem with the encoding declaration under Windows, the elimination of potential DOS in bytes.decode () and some others
• makehuman 1.0.0
  MakeHuman is a program for creating three-dimensional models of people for any purpose - illustrations, animation, games. Written entirely in Python

Conferences, events, developer meetings

• Dive into IT: spring workshops for razbotchikov in Kazan
  They promise newcomers help when they dive into the topic, and to experienced docks to open the way to further development, escorting unexpected solutions, little-known features and cunning techniques to the world.
  
  Finish 2 courses:
  - Web in Python
  - Advanced Python