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actually, there was a bit more

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Julio Biason 11 years ago
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93f3e32ae8
  1. 48
      python.html

48
python.html

@ -15,9 +15,11 @@
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@ -590,6 +592,17 @@ Julio
<section>
<p>No Python 3, basta usar <code>super().__init__()</code>.
</section>
<section>
<p>Propriedades podem ser injetadas a qualquer momento.</p>
&gt;&gt;&gt; class A(object):
&gt;&gt;&gt; def __init__(self):
&gt;&gt;&gt; self.value = 10
&gt;&gt;&gt;
&gt;&gt;&gt; a = A()
&gt;&gt;&gt; a.name = 'Julio'
</section>
</section>
<section>
@ -690,9 +703,9 @@ Julio
&gt;&gt;&gt; print kwargs
&gt;&gt;&gt;
&gt;&gt;&gt; a(a=1)
{a: 1}
{'a': 1}
&gt;&gt;&gt; a(value1=10, a=2)
{value1: 10, a: 2}
{'value1': 10, 'a': 2}
</code></pre></p>
<p><code>**</code> pega somente os parâmetros que tem nome.</p>
@ -706,10 +719,10 @@ Julio
&gt;&gt;&gt;
&gt;&gt;&gt; a(a=1)
[]
{a: 1}
{'a': 1}
&gt;&gt;&gt; a(1, 2, 3, a=5)
[1, 2, 3]
{a: 5}
{'a': 5}
</code></pre></p>
</section>
@ -722,6 +735,8 @@ Julio
&gt;&gt;&gt; print 'name = ', name
&gt;&gt;&gt; print 'kwargs =', kwargs
</code></pre></p>
<p>Saída de uma chamada desta função fica a cargo do leitor.</p>
</section>
<section>
@ -742,7 +757,7 @@ Julio
&gt;&gt;&gt; def funcao(a, b, c):
&gt;&gt;&gt; return (a + b) / c
&gt;&gt;&gt;
&gt;&gt;&gt; params = {b: 2, c: 3, a:10}
&gt;&gt;&gt; params = {'b': 2, 'c': 3, 'a':10}
&gt;&gt;&gt; funcao(**params)
</code></pre></p>
</section>
@ -768,6 +783,25 @@ Julio
&gt;&gt;&gt;
</code></pre></p>
</section>
<section>
<p>Como funções são cidadãos de primeira classe e classes podem
ter funções injetadas, pode-se extender uma classe em tempo
de execução.</p>
<p><pre><code data-trim>
&gt;&gt;&gt; class A(object):
&gt;&gt;&gt; def __init__(self):
&gt;&gt;&gt; self.value = 10
&gt;&gt;&gt;
&gt;&gt;&gt; def show_name(self):
&gt;&gt;&gt; print 'Julio'
&gt;&gt;&gt;
&gt;&gt;&gt; a = A()
&gt;&gt;&gt; a.show = show_name
&gt;&gt;&gt; a.show()
</code></pre></p>
</section>
</section>
<section>
@ -865,7 +899,7 @@ Julio
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