Python-digest # 15. News, interesting projects, articles and interviews [February 18, 2013 - February 23, 2014]

We have not managed to collect a lot of news for today, but they are quite interesting. There will be games, and development for mobile devices, and sound processing, and a great overview of ORM, as well as news with Pewee sweets. In addition, the conference in Kazan is rapidly approaching (it will take place on March 1).

Taking this opportunity, I want to congratulate the defenders of the fatherland on the last holiday of February 23 and all-all on the victory in the overall standings of the Olympiad.

Thank you owlman75 for the illustration and kind words, thanks to which I decided to make a release, despite the fact that I had filled up the promised time and faced personal problems.
')
I ask for help - can someone share or develop UserScript for automatically uploading pictures on habrastorage? He will greatly speed up the publication procedure.

news

• PEP463 - expressions that can catch exceptions
  An interesting sentence to implement an expression that can catch exceptions in the style:
  lst = [1, 2]
  value = lst [2] except IndexError: "No value"
  

Articles and Interviews

• Interactive shell on python.org
  Together with the redesign, you can now run an interactive console with 3.3 on the most important python site
• Write music
  For me personally, quite unexpected in content, a great article on how to work with sound, using binding to the interesting and separately from the Pyhton library of Sonic Field
• Window functions, case expressions, transactional savepoints in peewee
  This is a description of the new ORM functionality. In addition to the above, Array and JSON fields have been added for Postgresql, as well as Union, Intersect Except expressions for merging queries.
• Native system dialogs in SL4A
  
• Regular golf
  The second part and a series of articles on complex regular expressions with code examples and measurements of its performance
• Vertical load distribution
  The author suggests dividing server resources depending on the required load on specific URL groups.
• Implementation of the game sea battle
  Solid hardcore, without GUI and network, but with AI
• Features of the range function in python 3
  
• Correct work with CPython signals
  In some cases, working with signals in CPython can lead to an infinite wait cycle. The author of the article considers the causes of such situations and makes recommendations for solving the problem.
• Running Kivy + SL4A on QPython
  If in kivy you lack the features of SL4A, then you can use the author's recipe and combine these two great projects with QPython
• What tools do superstars use?
  Short interviews with some active members of the python-community on the subject of a subject
• ORM Review
  Brief information and comparison of the advantages and disadvantages of ORM SQLObject, Storm, Django ORM, peewee, SQLAlchemy
• Build application delivery using cx_Freeze
  Recipe for a Distributable Application for the Windows Platform
• Games with Manager, Lock from multiprocessing module
  
• Comparison with None
  Subtleties of the operator is

Interesting projects, tools, libraries

• The python.org site has been updated.
  Updated design, laid out the source code , in which you can make sure that the site is made on Django
• pivideo.org - collection of links to videos from foreign conferences
  It so happened that in our digest extremely rarely published links to English-language videos. For those who lack this, they can easily use the pyvideo.org website - over 2000 videos from various conferences, meetings of developers and others have already been collected there.
• caniusepython3 - is the project ready for python3
  A tool that simplifies the process of verifying project compliance with Python3 requirements
• It seems that PaaS Domino got a free plan with 1 core and 4 Gb RAM
  Perhaps this is news from the OBS section, but the author of the article provides a screenshot of the web interface.

Releases

• AppScale 1.14.0
  Timed to Valentine's Day release of a platform competing with GAE

Conferences, events, developer meetings

• Python DevDay in Kazan
  Conference is scheduled for March 1
  Approximate topics of reports:
  “Why Python?” - prefer Nikolay Telepenin, BARS Group
  “How Python is Used in Yandex” - q210 Timur Zaripov, Yandex
  “Literate Programming etc.” - Astynax Alexey Pirogov, BARS Group
  “We are reviving web applications” - kirovilya Ilya Kirov, BARS Group
  “Behave Driven Development in Python” - Kirill Borisov, BARS Group
  ”Python & enterprise: translation difficulties" - Nikolay Telepenin prefer , BARS Group
  “Introduction to PyPy” - histrio Rinat Sabitov, BARS Group
  “Localization and internationalization of django applications” - monIToringe Ruslan Yuldashev, GetGoing