What in fact is this Python? Serge Matveenko DataArt twitter.com/lig1 

Python could be like this 

Also Python could be like this 

However we are talking about that Python 

Disclaimer: a lot of dates here 

Path to Python 2.0 ● 1980s — ABC — “Centrum Wiskunde & Informatica” ● December 1989 — Guido van Rossum “Centrum Wiskunde & Informatica” ● February, 1991 — Python 0.9.0 ● January, 1994 — Python 1.0 ● 1995 — Python 1.2 ● “Corporation for National Research Initiatives” ● May, 2000 — Independent development ● September, 2000 — Python 1.6 — last at CNRI ● September, 2000 — Python 2.0 — the first modern 

Python 2.0 ● SourceForge ● PEPs ● Unicode ● List Comprehensions ● Augmented Assignment `+=`, `-=` , … ● String Methods `s.join(seq)` ● gc module ● apply(f, args, kw) → f(*args, **kwargs) ● `print >> sys.stderr, "Hello"` ● `zip()` ● `from distutils.core import setup` ● codecs, zipfile, mmap, xml.sax, xml.dom foo = [0, 2, 1] bar = [x for x in foo if x] y = 2 y += 1 print y == 2 # 0 

Python 2.0 → Python 2.5 ● Python 2.1 - April 17, 2001 ○ unittest ● Python 2.3 - July 29, 2003 ○ PEP 285 -- Adding a bool type ● Python 2.4 - November 30, 2004 ○ PEP 318 -- Decorators for Functions and Methods ● Python 2.5 - September 19, 2006 ○ PEP 308 -- Conditional Expressions ● Zope 2 - 1998 ● Zope 3 / BlueBream - 2004 ● Django - July 21, 2005 

Python 2.0 → Python 2.5 def bool_or_nothing(func): def wrapper(arg): if arg in [0, 1]: return func(arg) else: return None return wrapper def foo(arg): return not arg foo = bool_or_nothing(foo) def bool_or_nothing(func): def wrapper(arg): return ( func(arg) if isinstance(arg, bool) else None) return wrapper @bool_or_nothing def foo(arg): return not arg 

Zope → Django If you write a custom description always use for it {% if latest_question_list %}

{% for question in latest_question_list %}
• {{ question.question_text }}
{% endfor %}

{% else %}

No polls are available.

{% endif %} 

Django from django.http import HttpResponse import datetime def current_datetime(request): now = datetime.datetime.now() html = "It is now %s." % now return HttpResponse(html) from django.conf.urls import url from django.contrib import admin urlpatterns = [ url(r'^admin/', admin.site.urls), url(r'^posts/$' , views.post_list, name= 'post_list' ), ] 

Six - Pre-Modern Era ● Python 2.6 - October 1, 2008 ○ PEP 343 -- The "with" Statement ○ PEP 3129 -- Class Decorators ○ multiprocessing ● Python 3.0 - December 3, 2008 ○ PEP 3107 -- Function Annotations ○ PEP 3129 -- Class Decorators ● Python 2.7 - July 3, 2010 ○ More Python 3 compatibility ● Python 3.2 - February 20, 2011 ○ The first mature ● Pypy - 2008 ● Zope Five - 2009 ● Pytest - Aug 4, 2009 ● Flask - April 1, 2010 ● Six - Mar 15, 2011 ● Pip - April 4, 2011 

Python 3 — Modern Era ● Python 3.3 - September 29, 2012 ○ PEP 380 -- Syntax for Delegating to a Subgenerator ○ PEP 414 -- Explicit Unicode Literal for Python 3.3 ● Python 3.4 - March 16, 2014 ○ asyncio ● Python 3.5 - September 13, 2015 ○ PEP 484 -- Type Hints ○ PEP 492 -- Coroutines with async and await syntax ● Python 3.6 - December 23, 2016 ○ PEP 526 -- Syntax for Variable Annotations ○ PEP 525 -- Asynchronous Generators ○ PEP 628 -- Add math.tau ● Mypy - Dec 7, 2012 ● Pypy3 - June 20, 2014 

It's a kind of magic async def ping_server(ip: str): # ping code here... async def ping_local(): async with connection.connect(): ip: str = await connection.get_ip() return await ping_server(ip) 

Why Python? ● Web Development ● Scientific and Numeric ● Education ● Desktop GUIs ● 3D Modelling ● Q&A ● Automation ● Embedded Systems 

Web development ● Django ● Flask ● Tornado ● Plone ● aiohttp ● requests ● bottle ● WebOb 

Scientific and Numeric ● NumPy ● SciPy ● Pandas ● Jupyter ● PyOpenCL ● Scikit-learn 

Education ● Tutorials ● Books ● Videos ● Academic papers ● pygame ● … ● Raspberry Pi 

Desktop GUIs ● PyQT ● GTK ● Tkinter ● wxWidgets ● Kivy (mobile apps) 

Automation ● Ansible ● SaltStack ● fabric ● Bash replacement 

Why Python? ● Web Development ● Scientific and Numeric ● Education ● Desktop GUIs ● 3D Modelling ● Q&A ● Automation ● Embedded Systems 

Thank you! Serge Matveenko DataArt twitter.com/lig1 t.me/SergeMatveenko