Finish presentation for PyCaxias 2020

pycaxias2020.html

@@ -234,6 +234,166 @@
 						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>
             </div>
         </div>