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419 lines
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419 lines
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<title>Fugindo para as Colinas com Python</title> |
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<meta name="author" content="Hakim El Hattab"> |
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<div class="reveal"> |
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<div class="slides"> |
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<section> |
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<section data-background="_images/python.jpg"> |
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<h1 class="semi-opaque">Fugindo para as Colinas Com Python</h1> |
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</section> |
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</section> |
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<section> |
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<section> |
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<img src="_images/avatar-20170726.png" alt="Me" style="float:left;width:200px;" class="no-border"> |
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<div> |
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<ul class="empty"> |
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<li>Júlio Biason</li> |
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<li>@juliobiason</li> |
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<li>julio.biason@gmail.com</li> |
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<li><a href="http://presentations.juliobiason.net">http://presentations.juliobiason.net</a></li> |
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</ul> |
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</div> |
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</section> |
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<section> |
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<img src="_images/start-a-fight.jpg" alt="Eu faço perguntas em reuniões que eu não sei nada e reunião explode; não é de propósito" class='stretch'/> |
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<aside class="notes"> |
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Eu sou famoso (ou era) por entrar eu reuniões, fazer uma |
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pergunta e a reunião explodir em discussões (úteis, diga-se |
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de passagem). Mas eu não fazia isso de propósito. |
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</aside> |
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</section> |
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<section> |
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<img src="_images/fast-speaker.jpg" alt="Eu falo rárpido"> |
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<aside class="notes"> |
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Eu também tenho costume de falar rápido. |
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Essa apresentação talvez termine em menos de |
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20 minutos, mas eu deixo mais tempo para as |
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perguntas dessa forma. |
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</aside> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>O "Hello World"</h2> |
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<pre><code>print("Hello world")</code></pre> |
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<aside class="notes"> |
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Hello world não explica muita coisa sobre |
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uma linguagem, então eu resolvi falar |
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de outro problema. |
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</aside> |
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</section> |
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<section> |
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<h2>O "Fujam para as Colinas"</h2> |
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<pre><code>print("Fujam para as colinas")</code></pre> |
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<p class="fragment"> |
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Fulam Para As Cojinas |
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</p> |
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<p class="fragment"> |
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Julam Para As Conifas |
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</p> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Passo 1: Marcar onde entram os valores</h2> |
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<pre><code> |
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frase = 'Fujam para as colinas' |
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print(frase) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Passo 1: Marcar onde entram os valores</h2> |
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<pre><code> |
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consoantes = ['f', 'j', 'c', 'l', 'n'] |
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frase = 'Fujam para as colinas' |
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print(frase) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Passo 1: Marcar onde entram os valores</h2> |
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<pre><code> |
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$ python |
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Python 3.6.2 (default, Aug 11 2017, 11:59:59) |
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[GCC 7.1.1 20170622 (Red Hat 7.1.1-3)] on linux |
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Type "help", "copyright", "credits" or "license" for more information. |
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>>> help(str) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Passo 1: Marcar onde entram os valores</h2> |
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<pre><code> |
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| format(...) |
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| S.format(*args, **kwargs) -> string |
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| |
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| Return a formatted version of S, using substitutions from args and kwargs. |
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| The substitutions are identified by braces ('{' and '}'). |
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</code></pre> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Pausa: <code>format</code></h2> |
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<pre><code> |
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>>> '{} {}.'.format('Hello', 'world') |
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Hello world. |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa: <code>format</code></h2> |
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<pre><code> |
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>>> '{1} {0}.'.format('Hello', 'world') |
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world Hello. |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa: <code>format</code></h2> |
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<pre><code> |
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>>> '{primeiro} {segundo}.'.format(primeiro='Hello', |
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segundo='world') |
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Hello world. |
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</code></pre> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> def soma(primeiro, segundo): |
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... return primeiro + segundo |
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>>> |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> soma(1, 2) |
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3 |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> soma(primeiro=3, segundo=4) |
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7 |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> soma(segundo=5, primeiro=6) |
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11 |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> def varargs(*args): |
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... print(args) |
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>>> |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> varargs('f', 'j', 'c', 'l', 'm') |
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['f', 'j', 'c', 'l', 'm'] |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> def varargs(**kwargs): |
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... print(kwargs) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> varargs(primeiro=2, segundo=4) |
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{'primeiro': 2, 'segundo': 4} |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> def varargs(*args, **kwargs): |
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... print(args) |
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... print(kwargs) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> varargs('f', 'j', 'c', primeiro=2, segundo=4) |
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['f', 'j', 'c'] |
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{'primeiro': 2, 'segundo': 4} |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> valores = [3, 4] |
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>>> soma(*valores) |
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7 |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa da Pausa: <code>*args</code> e <code>**kwargs</code></h2> |
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<pre><code> |
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>>> valores = {'segundo': 12, 'primeiro': 7} |
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>>> soma(**valores) |
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19 |
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</code></pre> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Passo 1: Marcar onde entram os valores</h2> |
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<pre><code> |
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consoantes = ['f', 'j', 'c', 'l', 'n'] |
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frase = 'Fujam para as colinas' |
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print(frase) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Passo 1: Marcar onde entram os valores</h2> |
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<pre><code> |
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consoantes = ['f', 'j', 'c', 'l', 'n'] |
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frase = '{}u{}am para as {}o{}i{}as' |
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</code></pre> |
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</section> |
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<section> |
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<h2>Passo 1: Marcar onde entram os valores</h2> |
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<pre><code> |
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consoantes = ['f', 'j', 'c', 'l', 'n'] |
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frase = '{}u{}am para as {}o{}i{}as' |
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print(frase.format(*consoantes)) |
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</code></pre> |
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</section> |
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</section> |
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<section> |
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<section> |
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<h2>Passo 2: Randomizar a lista</h2> |
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<pre><code> |
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import random |
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consoantes = ['f', 'j', 'c', 'l', 'n'] |
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random.shuffle(consoantes) |
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frase = '{}u{}am para as {}o{}i{}as' |
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print(frase.format(*consoantes)) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa: shuffle e "in place"</h2> |
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<pre><code> |
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>>> import random |
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>>> help(random.shuffle) |
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</code></pre> |
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</section> |
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<section> |
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<h2>Pausa: shuffle e "in place"</h2> |
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<pre><code> |
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shuffle(self, x, random=None) method of random.Random instance |
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x, random=random.random -> shuffle list x in place; return None. |
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</code></pre> |
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</section> |
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</section> |
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