You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
219 lines
6.2 KiB
219 lines
6.2 KiB
<!doctype html> |
|
<html lang="en"> |
|
<head> |
|
<meta charset="utf-8"> |
|
|
|
<title>Python 2 + 3 = Six</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="reveal.js/css/reveal.css"> |
|
<link rel="stylesheet" href="reveal.js/css/theme/black.css" id="theme"> |
|
|
|
<!-- Code syntax highlighting --> |
|
<link rel="stylesheet" href="reveal.js/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"> |
|
<div class="slides"> |
|
<section> |
|
<section> |
|
<h1>Python 2 + 3 = Six</h1> |
|
</section> |
|
</section> |
|
|
|
<section> |
|
<section> |
|
<img src="_images/AYV1X0yv.png" alt="Me" style="float:left;"> |
|
|
|
<div> |
|
<ul> |
|
<li>Júlio Biason</li> |
|
<li>CWI Software</li> |
|
<li>@juliobiason</li> |
|
<li>julio.biason@gmail.com</li> |
|
</ul> |
|
</div> |
|
</section> |
|
</section> |
|
|
|
<section> |
|
<section> |
|
<h2>Por que Python 3?</h2> |
|
|
|
<ul> |
|
<li>Unicode por padrão <span class="frament">(adeus UnicodeDecodeError)</span></li> |
|
<li class="fragment">AsyncIO</li> |
|
<li class="fragment">SUPORTE AO PYTHON 2 TERMINA EM 2020!</li> |
|
</ul> |
|
</section> |
|
|
|
<section> |
|
<img src="_images/bigstock-decorated-christmas-tree-close-76005554-1.jpg" style='float:left;' width="20%"> |
|
<img src='_images/carna-index-04.jpg' class="fragment" width="20%"> |
|
<img src="_images/2020.jpg" style='float:right;' class="fragment", width="20%"> |
|
</section> |
|
</section> |
|
|
|
<section> |
|
<section> |
|
<h2>Caminho para o Python 3</h2> |
|
|
|
<ul> |
|
<li><code>python -3 [script]</code></li> |
|
<li><code>2to3</code></li> |
|
</ul> |
|
</section> |
|
|
|
<section> |
|
<h2>O que <code>2to3</code> arruma</h2> |
|
|
|
<ul> |
|
<li><code>print</code> não vai funcionar (é função)</li> |
|
<li><code>iter*</code> não vai funcionar</li> |
|
<li><code>urlib</code> mudou tudo</li> |
|
<li><code>urlparse</code> mudou tudo</li> |
|
</ul> |
|
|
|
<p class="fragment">(<code>%</code> para formatar strings |
|
retornou, <code>2to3</code> não muda para <code>format()</code>)</p> |
|
</section> |
|
</section> |
|
|
|
<section> |
|
<section> |
|
<h3>"Mais minha infra usa Centos 4 e não tem Python 3 pra Centos!"</h3> |
|
<img src="_images/boycrying.jpg" alt=""/> |
|
</section> |
|
|
|
<section> |
|
<h1>Six ao resgate!</h1> |
|
|
|
<h2 class="fragment">e seu fiel companheiro <code>__future__</code>!</h2> |
|
</section> |
|
|
|
<section> |
|
<h2>Exemplo <span class="fragment">(estúpido)</span></h2> |
|
<pre><code class="hljs python">import collections |
|
|
|
class Model(object): |
|
def __init__(self, word): |
|
self._count = None |
|
self.word = word |
|
return |
|
|
|
@property |
|
def word(self): |
|
return self._word |
|
|
|
@word.setter |
|
def word(self, word): |
|
self._word = word |
|
self._count = collections.Counter(word)</code></pre> |
|
</section> |
|
|
|
<section> |
|
<pre><code class="hljs python"> |
|
@property |
|
def letters(self): |
|
return self._count |
|
|
|
def __getitem__(self, pos): |
|
return self._count[pos] |
|
</code></pre> |
|
</section> |
|
|
|
<section> |
|
<pre><code class="hljs python"> |
|
if __name__ == "__main__": |
|
word = Model('This is an ex-parrot') |
|
for letter, count in word.letters.iteritems(): |
|
print letter, count |
|
</code></pre> |
|
</section> |
|
|
|
<section> |
|
<h2>E Python 3?</h2> |
|
|
|
<p><code>class Model(object):</code></p> |
|
|
|
<p>Todas as classes são new style, mas Python 3 não |
|
reclama disso.</p> |
|
</section> |
|
|
|
<section> |
|
<h2>E Python 3?</h2> |
|
|
|
<p><code>for letter, count in word.letters.iteritems():</code></p> |
|
<p><code>iteritems()</code> não existe mais no Python 3.</p> |
|
<p class="fragment">Python 3 tem apenas <code>items()</code>, |
|
que funciona de forma diferente no Python 2.</p> |
|
<p class="fragment"><code>items()</code> no Python 2 gera uma |
|
lista inteira nova ao invés de ser um iterador.</p> |
|
</section> |
|
|
|
<section> |
|
<h2>E Python 3?</h2> |
|
|
|
<p><code>print letter, count</code></p> |
|
|
|
<p><code>print</code> agora é uma função.</p> |
|
|
|
<p>Algumas funcionalidades mudaram (por exemplo, não há |
|
mais espaço entre itens).</p> |
|
</section> |
|
</section> |
|
</div> |
|
</div> |
|
|
|
<script src="reveal.js/lib/js/head.min.js"></script> |
|
<script src="reveal.js/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, callback: function() { hljs.initHighlightingOnLoad(); } }, |
|
{ src: 'plugin/zoom-js/zoom.js', async: true }, |
|
{ src: 'plugin/notes/notes.js', async: true } |
|
] |
|
}); |
|
|
|
</script> |
|
|
|
</body> |
|
</html> |
|
|
|
|