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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Wielodzedziczenie</title>
<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
<meta name="author" content="Hakim El Hattab">
<meta name="apple-mobile-web-app-capable" content="yes" />
<meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, minimal-ui">
<link rel="stylesheet" href="css/reveal.css">
<link rel="stylesheet" href="css/theme/black.css" id="theme">
<!-- Code syntax highlighting -->
<link rel="stylesheet" href="lib/css/zenburn.css">
<!-- Printing and PDF exports -->
<script>
var link = document.createElement( 'link' );
link.rel = 'stylesheet';
link.type = 'text/css';
link.href = window.location.search.match( /print-pdf/gi ) ? 'css/print/pdf.css' : 'css/print/paper.css';
document.getElementsByTagName( 'head' )[0].appendChild( link );
</script>
<!--[if lt IE 9]>
<script src="lib/js/html5shiv.js"></script>
<![endif]-->
</head>
<body>
<div class="reveal">
<!-- Any section element inside of this container is displayed as a slide -->
<div class="slides">
<section>
<h3>Wszystko co chcielibyście wiedzieć o wielodziedziczeniu, ale boicie się zaimplementować</h3>
<p>
<small>
Stworzona przez Dominik "Socek" Długajczyk</a> <br />
<a href="http://twitter.com/WingedSocek">@WingedSocek</a><br />
</small>
</p>
</section>
<section>
<h2>Raymond Hettinger</h2>
<h2>Super considered super!</h2>
</section>
<section>
<section>
<h2>Wielodziedziczenie</h2>
<p>Wielu używało (niejawnie), niewielu wie jak działa.</p>
</p>
</section>
<section>
<img src="wielo/pyramid.png" style="height: 650px;">
</section>
<section>
<h2>To po prostu działa</h2>
</section>
</section>
<!-- Example of nested vertical slides -->
<section>
<section>
<h2>Podstawowy problem wielodziedziczenia</h2>
<p>"The Diamond problem"</p>
</section>
<section>
<img src="wielo/graph1.png" style="height: auto; width: 55%;">
</section>
</section>
<section>
<section>
<h2>New Style Classes</h2>
<h2 class="fragment">Czyli MRO</h2>
<h2 class="fragment">Czyli "C3 Linearization Algorithm"</h2>
</section>
<section>
<img src="wielo/graph2.png" style="height: auto; width: 55%;">
</section>
</section>
<section>
<section>
<h2>Eksperyment z wielodziedziczeniem</h2>
<h2 class="fragment">Implementacja aplikacji</h2>
<h2 class="fragment">Na bazie frameworka</h2>
<p class="fragment">Impaf</p>
</section>
<section>
<img src="wielo/pyramid.png" style="height: 650px;">
</section>
<section>
<img src="wielo/graph3.png" style="height: 650px;" >
</section>
</section>
<section>
<section>
<h2>Podstawy działania Impaf</h2>
<ul>
<li>class Application(object)</li>
<li>class Requestable(object)</li>
<li>class Controller(Requestable)</li>
<li>class Widget(Requestable)</li>
</ul>
</section>
<section>
<h2>Przykładowy plugin dla Jinja2</h2>
<ul>
<li>class Jinja2Application(Application)</li>
<li>class Jinja2Requestable(Requestable)</li>
<li>class BaseWidget(Widget, Jinja2Requestable)</li>
</ul>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class ImpexApplication(
HamlApplication, // Haml Template
BeakerApplication, // Sesja
SqlAlchemyApplication, // sql ORM
FanstaticApplication, // obsługi plików statycznych
AuthApplication, // obsługa autoryzacji
):
</code></pre>
</section>
<section>
<img src="wielo/graph6.png" style="transform: scale(1.3) translateZ(0);">
</section>
<section>
<img src="wielo/graph7.png" style="transform: scale(1.3) translateZ(0);">
</section>
<section>
<pre><code data-trim contenteditable class="python">
class Requestable(
BeakerRequestable,
Jinja2Requestable,
AuthRequestable,
):
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class Controller(
Requestable,
FanstaticController,
FormskitController,
FlashMessageController,
):
</code></pre>
</section>
</section>
<section>
<section>
<h2>O czym trzeba pamiętać</h2>
</section>
<section>
<img src="wielo/graph2.png" style="height: auto; width: 55%;">
</section>
<section>
<h2>Nie zmieniać argumentów metody</h2>
</section>
<section>
<h2>Uwaga na namespace!</h2>
</section>
</section>
<section>
<section>
<h2>Problem: Wysoki próg wejścia</h2>
</section>
<section>
<img src="wielo/graph6.png" style="transform: scale(1.3) translateZ(0);">
</section>
</section>
<section>
<section>
<h1>Testowanie</h1>
<h3>Czyli jak zmockować super</h3>
</section>
<section>
<img src="wielo/graph4.png" style="height: auto; width: 55%;">
</section>
<section>
<img src="wielo/graph5.png" style="height: auto; width: 55%;">
</section>
<section>
<pre><code data-trim contenteditable class="python">
class Rodzic(object):
def metoda(self):
print('Rodzic')
class Dziecko(Rodzic):
def metoda(self):
super().metoda()
print('Dziecko')
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class MockedDziecko(Rodzic):
def metoda(self):
print('Mock!')
class ExampleDziecko(Dziecko, MockedDziecko):
def metoda(self):
super().metoda()
print('Example!')
Dziecko().metoda()
print('---')
ExampleDziecko().metoda()
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable>
Rodzic
Dziecko
---
Mock!
Dziecko
Example!
</code></pre>
</section>
</section>
<section>
<h2>Wild firemark appears!</h2>
<img src="wielo/firemark.jpe" style="height: auto; width: 55%;">
</section>
<section>
<section>
<h2>Wielodziedziczenie</h2>
<h2>a</h2>
<h2>Metaklasy</h2>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class FirstMeta(type): pass
class SecondMeta(type): pass
class First(object, metaclass=FirstMeta): pass
class Second(object, metaclass=SecondMeta): pass
class Third(First, Second): pass
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable>
TypeError: metaclass conflict: the metaclass of a derived class
must be a (non-strict) subclass of the metaclasses
of all its bases
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class FirstMeta(type): pass
class SecondMeta(type): pass
class First(object, metaclass=FirstMeta): pass
class Second(object, metaclass=SecondMeta): pass
class ThirdMeta(FirstMeta, SecondMeta): pass
class Third(First, Second, metaclass=ThirdMeta): pass
</code></pre>
</section>
</section>
<section>
<h2>Tyle o wielodziedziczeniu</h2>
</section>
<section>
<section>
<h2>Konfiguracja</h2>
<pre><code data-trim contenteditable class="python">
class BaseWorker(object):
configuration = {
'period_in_minut': 30,
'chunk': 100,
}
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class NewWorker(BaseWorker):
configuration = {
'period_in_minut': 15,
'chunk': 100,
}
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class BaseWorker(object):
period_in_minut = 30
chunk = 100
class NewWorker(BaseWorker):
period_in_minut = 15
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable class="python">
class First(object):
class Meta(object):
z = 10
class Second(First):
class Meta(First.Meta):
z = 15
print(Second().Meta.z)
>> 15
</code></pre>
</section>
</section>
<section>
<section>
<h2>Konstruktor kopiujący</h2>
<pre><code data-trim contenteditable class="python">
class ImpafRequest(Request):
</code></pre>
</section>
<section>
<pre><code data-trim contenteditable class="python">
from copy import deepcopy
class Original(object):
def __init__(self):
self._hidden = 10
class MyOriginal(Original):
def __init__(self, original):
self.__dict__ = deepcopy(original.__dict__)
original = Original()
my = MyOriginal(original)
print(my._hidden)
>> 10
</code></pre>
</section>
</section>
<section>
<h2>Niestety to już koniec</h2>
<h3>Jakieś pytania?</h3>
</section>
</div>
</div>
<script src="lib/js/head.min.js"></script>
<script src="js/reveal.js"></script>
<script>
// Full list of configuration options available at:
// https://github.com/hakimel/reveal.js#configuration
Reveal.initialize({
controls: true,
progress: true,
history: true,
center: true,
transition: 'slide', // none/fade/slide/convex/concave/zoom
// Optional reveal.js plugins
dependencies: [
{ src: 'lib/js/classList.js', condition: function() { return !document.body.classList; } },
{ src: 'plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
{ src: 'plugin/highlight/highlight.js', async: true, condition: function() { return !!document.querySelector( 'pre code' ); }, callback: function() { hljs.initHighlightingOnLoad(); } },
{ src: 'plugin/zoom-js/zoom.js', async: true },
{ src: 'plugin/notes/notes.js', async: true }
]
});
</script>
</body>
</html>