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Great new diagrams for our notes ... Python releases

Photographing the boardWhen training, I project onto a white wall ... and I draw onto the projected image, and add extra notes and diagrams around the side too - after all, the whole wall is a whiteboard. Some of the diagrams and slides that I'll come up with are new / unique for an individual course, and I end up photographing the whiteboard or parts of it, and so do my delegates.


And I also photograph the board ....

Python upgrade and release routeHere's a sample diagram, showing how Python has gone through a series of updates. At version 2.3, "new style classes" were added to correct some (frankly) quite small issues - at least as far as the regular user was concerned - in the OO model / specification. And "old style classes" were retained, and still are up to release 2.6 and 2.7.

But there are other things that need(ed) changing, and without being held back by the need for ongoing source code compatibility, and so along came Python 3.0 ... now Python 3.1 ... which breaks some source code compatibility things. In Python 3.0, you can only use new style classes, print is a function which changes its syntax oh so slightly, and there are some other things. So I drew a strong read cross on the line from Python 2 to Python 3 ... but then a green line bypassing that cross to show there IS a way - an automated program - to make the change.

(written 2009-07-13)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
Y050 - Python - General
  [4295] A longer Python ... training course - (2014-09-16)
  [4236] Using Python to analyse last years forum logs. Good coding practise discussion. - (2014-01-01)
  [3935] Whether you have programmed before or not, we can teach you Python - (2012-11-25)
  [3911] How well do you know Perl and / or Python? - (2012-11-04)
  [3903] Python Programming class for delegates who have already self-taught the basics - (2012-10-25)
  [3902] Shell - Grep - Sed - Awk - Perl - Python - which to use when? - (2012-10-22)
  [3816] Want to escape the Olympics? Learn to program in the countryside! - (2012-07-23)
  [3798] When you should use Object Orientation even in a short program - Python example - (2012-07-06)
  [3519] Python - current versions and implementations (CPython, Jython, IronPython etc) - (2011-11-13)
  [3489] Python courses and Private courses - gently updating our product to keep it ahead of the game - (2011-10-20)
  [3463] Busy weekend of contrasts. - (2011-10-03)
  [3076] Python through the Snow - (2010-12-01)
  [2822] Python training courses for use with ESRI ArcMap software - (2010-06-23)
  [2778] Learning to program in Python 2 ... and / or in Python 3 - (2010-05-24)
  [2504] Learning to program in ... - (2009-11-15)
  [2394] Two days of demonstration scripts in Python - (2009-09-05)
  [2367] Learning to program - how to jump the first hurdles - (2009-08-20)
  [2227] Learning PHP, Ruby, Lua and Python - upcoming courses - (2009-06-11)
  [2020] Learning Python - many new example programs - (2009-01-31)
  [2017] Python - a truly dynamic language - (2009-01-30)
  [16] Python training - (2004-08-16)

Y300 - Python 3 - What is new, what's changed and why
  [2871] Moving from Python 2.6 to Python 3 - (2010-07-14)
  [2559] Moving the product forward - ours, and MySQL, Perl, PHP and Python too - (2010-01-01)
  [2277] Python classes / courses - what version do we train on? - (2009-07-10)
  [1791] The road ahead - Python 3 - (2008-09-10)
  [1788] Python 2 to Python 3 / Python 3000 / Py3k - (2008-09-07)
  [753] Python 3000 - the next generation - (2006-06-09)


Back to
Strings as collections in Python
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or
Horse's mouth home
Forward to
New to programming? It is natural (but needless) for you to be nervous
Some other Articles
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Great new diagrams for our notes ... Python releases
Strings as collections in Python
Everyone is in the customer relations business
Checking robots.txt from Python
Python - using exceptions to set a fallback
Creating and iterating through Python lists
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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