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

came fresh news about python and surrounding technologies. Interesting videos in Russian about django, articles on how to measure the code coverage, the decorators and the trees. In General, everyone will find something interesting.

Thank you owlman75 for illustration, and also everyone who sends news to the tool to create digests. There are even spammers ><

It is no secret that I collect news and mail PythonWeekly and PyCoders. This time was quite a funny situation — we gathered so good news is that almost all the materials from Friday's distribution was in our previous release. It seems PythonWeekly behind for a week from really fresh news. In addition, announcements of all the materials as you add them available



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Articles and interviews

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• Tree in one line
  Implementation of recursive structures in one line on the basis defaultdict

Apply visual effects to images in Django
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• SVGFig — in pure python library to create SVG
  Brief article is an introduction about the use of an interesting API project
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• Waiting for several different events in Tornado
  
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• Levels of code coverage tests
  The author wonders about how to measure how much code covered by tests and provides the answers to these questions, which he drew from his personal experiences and those of their colleagues
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• the design Pattern Visitor (Visitor)
  Briefly an example implementation of a popular design pattern
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• Decorators
  Another attempt to explain what is decorators, this time from Mike Driscoll. Judging by our digest, only lazy did not write on this subject article.
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• Processing audio in real time
  The author introduces the principles of operation of the module PyAudio and offers an example of the solution of one of the audio processing tasks, including with the use of Cython for performance optimization
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• code completion on tab for IDLE
  The author proposes a method of setting IDLE, in which the editor will offer the options of auto-completion when pressing tab when typing code
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• Analysis of nginx logs
  Use IPython and statistical modules to obtain useful data from the logs of the web server
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• All about parsing web pages
  Well, not all, of course, but the important basic parts and modules are lit

Migrating database from sqlite to postgres
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• Catch any exceptions in wxPython
  Traditionally detailed and full of code examples article about one of the subtle nuances of working with bindingly to popular graphic Toolkit
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• Simple parallel code execution using concurrent.futures
  This feature is available with version 3.3, and for those who want to simplify your parallel code now (even at 2.7) can once again pay attention to article illuminated us in one of the previous editions
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• Sublime Text 3 for python, javascript and web developers
  The Evangelical article with pictures about the new version of popular text editor
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Video


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Screencasts for django in Russian
Good screencasts on django framework for Russian language


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Books and documentation


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Programmable in Python
Piter publishing house advertises the latest edition of the book Michael Dawson on the Russian language and recommends it as the perfect aid for beginners to learn Python.


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Interesting projects, tools, libraries


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• growsdk — another attempt to create a CMS managed from a console on the principle of customizability of everything
  
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• peepdf — pdf investigate
  The library allows you to explore the pdf for correctness, the presence of malicious code, the presence of junk and invalid data
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• bunch — an appeal to the dictionary as an object
  The author suggests his own solution to implementing the treatment to elements of the dictionary of type foo['bar'] in object-oriented style foo.bar provided with scenarios serialization support update, iteration, etc.
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• Visualizing code execution
  An interesting online tool which allows you to view the graphical diagram step-by-step code execution
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• BlitzDB — document-oriented database in pure Python
  

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Releases


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• Python 3.3.5
  Release error-correcting — including regresivo to zipimport, a problem with the encoding Declaration Windows-eliminate potential DOS in bytes.decode() and some other
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• makehuman 1.0.0
  MakeHuman is a program for creating three-dimensional models of people for any purpose — illustrations, animations, games. Written entirely in Python

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Conferences, events, meeting developers


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Dive into IT: spring workshops for ezabatzeko in Kazan
Promise beginners help with immersion in the subject, and experienced the docks to open the way to further development, support on the way to the world of unexpected decisions, little-known features and bag of tricks.

Finished 2nd year:
— Web in Python
— Advanced Python

Article based on information from habrahabr.ru