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<title>PyCaxias 2020</title>
<meta name="description" content="Por que você deveria aprender Rust">
<meta name="author" content="Julio Biason">
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<div class="reveal">
<div class="slides">
<section>
<section data-background="_images/pycaxias.png" data-header>
<h2 class="semi-opaque">PyCaxias 2020</h2>
</section>
</section>
<section>
<img src="_images/avatar-20170726.png" alt="Me" style="float:left;width:200px;" class="no-border">
<div>
<ul class="empty">
<li>Júlio Biason</li>
<li><a href="https://functional.cafe/@juliobiason">https://functional.cafe/@juliobiason</a></li>
<li><a href="https://t.me/juliobiason">https://t.me/juliobiason</a></li>
<li>julio.biason@pm.me</li>
</ul>
</div>
</section>
<section>
<ul>
<li>Co-coordenador do meetup <strong>PyTche</strong></li>
<li>Coordenador do meetup <strong>Rust in POA</strong></li>
<li>Co-coordenador do meetup <strong>Design de Código</strong></li>
<li>Palestrante do <strong>Tchelinux</strong></li>
</ul>
</section>
<section>
<h3>JulioBiason.me</h3>
<ul>
<li><a href="https://blog.juliobiason.me/">Blog</a></li>
<li><a href="https://presentations.juliobiason.me/">Presentations</a></li>
<li><a href="https://git.juliobiason.me/">Git</a></li>
<li><a href="https://resume.juliobiason.me/">CV/Resumé</a></li>
<li><a href="https://books.juliobiason.me/">Books</a></li>
</ul>
</section>
<section>
<h3>"Coisas Que Eu Aprendi Na Marra (Em 30 Anos de Desenvolvimento de Software)</h3>
<h3 class="fragment">😞</h3>
</section>
<section>
<h2>Python: Passado, Presente e Futuro</h2>
<p class="fragment">... na minha visão</p>
</section>
<section data-background="_images/past.jpg">
<h2 class="semi-opaque">O Passado</h2>
</section>
<section>
<h3>Python 1.5</h3>
<img class="stretch" src="_images/python15.png" alt="">
</section>
<section>
<h3>Python 1.5 (1998)</h3>
<ul>
<li><code>assert</code></li>
<li>raw strings (<code>r''</code>)</li>
<li>Novos métodos de dicionários: <code>.clear()</code>, <code>.copy()</code>, <code>.update()</code>, <code>.get()</code></li>
</ul>
</section>
<section>
<p><code>[expression] and [on_true] or [on_false]</code></p>
</section>
<section>
<p>"Vamos fazer um <i>browser</i> em Python!"</p>
</section>
<section>
<img class="stretch" src="_images/tilefile.jpg" alt="">
</section>
<section>
<ul>
<li>Web Server</li>
<li class="fragment">Storage: <a href="https://docs.python.org/3/library/pickle.html?highlight=pickle#module-pickle">Pickle</a></li>
<li class="fragment">Atualizado storage: MySQL</li>
<li class="fragment">Criada toda uma camada para que o carregamento parecesse com leitura de pickles</li>
</ul>
<p class="fragment">Django 1.0: 2008</p>
</section>
<section>
<p>"É mais fácil pra mim vender AJAX e Rails do que Flash e Python."</p>
<p>-- Tilefile CEO</p>
</section>
<section>
<img class="stretch" src="_images/iplenix.png" alt="">
</section>
<section>
<img class="stretch" src="_images/consuela.jpeg" alt="">
</section>
<section data-background="_images/present.jpg">
<h2 class="semi-opaque">O Presente</h2>
</section>
<section>
<img class="stretch" src="_images/the-witch-is-dead.png" alt="">
</section>
<section>
<img class="stretch" src="_images/python27-clock.png" alt="">
</section>
<section>
<img class="stretch" src="_images/python-usage.png" alt="">
</section>
<section>
<img class="stretch" src="_images/ipython.png" alt="">
</section>
<section>
<img class="stretch" src="_images/ipython-notebook.png" alt="">
</section>
<section>
<img class="stretch" src="_images/jupyter.jpeg" alt="">
</section>
<section>
<img class="stretch" src="_images/scikit.jpeg" alt="">
</section>
<section>
<img class="stretch" src="_images/python-datascience.png" alt="">
</section>
<section>
<img class="stretch" src="_images/guido-no-bdfl.png" alt="">
</section>
<section data-background="_images/back-to-the-future.jpeg">
<h2 class="semi-opaque">O Futuro</h2>
</section>
<section>
<p>You can't connect the dots looking forward; you can only connect them looking backwards.</p>
<p>-- Steve Jobs</p>
</section>
<section>
<p>No man is an island,<br>
Entire of itself,<br>
Every man is a piece of the continent,<br>
A part of the main.</p>
<p>-- John Donne</p>
</section>
<section>
<h2>Type Hinting: Love it</h2>
</section>
<section>
<p>"Mas Python não tem tipos!"</p>
<pre class="fragment"><code data-trim>
In [1]: type(object)
Out[1]: type
</code></pre>
</section>
<section>
<img class="stretch" src="_images/isso-nao-prova-nada.png" alt="">
</section>
<section>
<pre><code data-trim>
In [4]: type("a")
Out[4]: str
In [5]: type(str)
Out[5]: type
</code></pre>
</section>
<section>
<pre><code data-trim>
def to_fahrenheit(temperature: int) -> int:
</code></pre>
</section>
<section>
<pre><code data-trim>
@dataclass
class Celcius:
temperature: int
def to_fahrenheit(temperature: Celcius) -> int:
</code></pre>
</section>
<section>
<h2>mypy</h2>
</section>
<section>
<img class="stretch" src="_images/tweet-python2020.png" alt="">
</section>
<section>
<h2>??</h2>
<p class="fragment">None-aware operator (PEP 505)</p>
<pre class="fragment"><code data-trim>
a ??= 'value'
</code></pre>
<pre class="fragment"><code data-trim>
a = a if a is not None else 'value'
</code></pre>
</section>
<section>
<h2>@</h2>
<p class="fragment">Dedicated infix operator for matrix multiplication (PEP 465)</p>
</section>
<section>
<h2>|</h2>
<p class="fragment">Union Operator to Dict (PEP 584)</p>
<pre class="fragment"><code data-trim>
dict1.update(dict2) # in-place
</code></pre>
<pre class="fragment"><code data-trim>
dict3 = dict1 | dict2
</code></pre>
<pre class="fragment"><code data-trim>
dict1 |= dict2 # same as .update()
</code></pre>
</section>
<section>
<h2>:=</h2>
<p class="fragment">Assignment Operator (PEP 572)</p>
<pre class="fragment"><code data-trim>
while chunk := file.read(8192):
process(chunk)
</code></pre>
</section>
<section>
<h2>@dict[key].attr[0].decorator</h2>
<p class="fragment">Relaxing Grammar Restrictions On Decorators (PEP 614)</p>
</section>
<section>
<h2>Steering Council <span class="fragment"> 🤔 </span></h2>
</section>
<section>
<h3>Python Positional-Only Parameters (PEP 570)</h3>
<pre><code data-trim>
pow(x, y, z=None, /)
...
&gt;&gt;&gt; pow(x=5, y=3)
Traceback (most recent call last):
File "&lt;stdin&gt;", line 1, in &lt;module&gt;
TypeError: pow() takes no keyword arguments
</code></pre>
</section>
<section>
<p>"Without the ability to specify which parameters are
positional-only, library authors must be careful when
choosing appropriate parameter names."</p>
<h1 class="fragment">🤦</h1>
</section>
<section>
<img class="stretch" src="_images/chrysalis.jpeg" alt="">
</section>
<section>
<img class="stretch" src="_images/oogway.jpeg" alt="">
</section>
<section>
<img class="stretch" src="_images/fear.jpeg" alt="">
</section>
<section>
<h1>??</h1>
</section>
<section data-background='_images/thats-all-folks.jpg'>
<div class="semi-opaque">
<ul class="empty">
<li><a href="https://functional.cafe/@juliobiason">https://functional.cafe/@juliobiason</a></li>
<li><a href="https://t.me/juliobiason">https://t.me/juliobiason</a></li>
<li>julio.biason@pm.me</li>
<li><a href="http://presentations.juliobiason.net">http://presentations.juliobiason.net</a></li>
</ul>
</div>
</section>
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