<?xml version="1.0" encoding="utf-8"?>

<feed xmlns="http://www.w3.org/2005/Atom"><title>PythonClub - debugging</title><link href="http://pythonclub.com.br/" rel="alternate"></link><link href="http://pythonclub.com.br/feeds/debugging.atom.xml" rel="self"></link><id>http://pythonclub.com.br/</id><updated>2015-02-15T22:30:00-02:00</updated><entry><title>Debugging em python (sem IDE)</title><link href="http://pythonclub.com.br/debugging-em-python-sem-ide.html" rel="alternate"></link><published>2015-02-15T22:30:00-02:00</published><updated>2015-02-15T22:30:00-02:00</updated><author><name>Diego Garcia</name></author><id>tag:pythonclub.com.br,2015-02-15:/debugging-em-python-sem-ide.html</id><summary type="html">&lt;figure style="float:right;"&gt;

&lt;img src="/images/drgarcia1986/debugging.png"&gt;

&lt;/figure&gt;

&lt;p&gt;&lt;/br&gt;

Um dos principais motivos que ainda levam desenvolvedores Python a recorrerem a IDEs pesadas e que requerem instalação é o &lt;strong&gt;debugging&lt;/strong&gt;.

Devs que vieram de linguagens como &lt;em&gt;DotNet&lt;/em&gt;, &lt;em&gt;Java&lt;/em&gt; e &lt;em&gt;Delphi&lt;/em&gt; por exemplo, estão acostumados a IDEs super pesadas e inchadas que no final das contas, além do debugging, só …&lt;/p&gt;</summary><content type="html">&lt;figure style="float:right;"&gt;

&lt;img src="/images/drgarcia1986/debugging.png"&gt;

&lt;/figure&gt;

&lt;p&gt;&lt;/br&gt;

Um dos principais motivos que ainda levam desenvolvedores Python a recorrerem a IDEs pesadas e que requerem instalação é o &lt;strong&gt;debugging&lt;/strong&gt;.

Devs que vieram de linguagens como &lt;em&gt;DotNet&lt;/em&gt;, &lt;em&gt;Java&lt;/em&gt; e &lt;em&gt;Delphi&lt;/em&gt; por exemplo, estão acostumados a IDEs super pesadas e inchadas que no final das contas, além do debugging, só servem para drenar memória RAM.

Brincadeiras a parte, não a motivos para você não dar uma chance ao &lt;strong&gt;VIM&lt;/strong&gt; ou ao &lt;strong&gt;Sublime&lt;/strong&gt;, pois para fazer debugging em scripts python, tudo que você precisa é o &lt;strong&gt;PDB&lt;/strong&gt;. &lt;/p&gt;

&lt;!-- MORE --&gt;

&lt;h1&gt;PDB&lt;/h1&gt;

&lt;p&gt;O &lt;code&gt;pdb&lt;/code&gt; é um módulo &lt;em&gt;buit-in&lt;/em&gt; que funciona como um console interativo, onde é posssível realizar debug de códigos python.

Nele é possível fazer um &lt;em&gt;step-by-step&lt;/em&gt; do código, verificando o valor de variaveis, definindo breakpoints, manipulando valores, etc.

É possível inclusive realizer &lt;em&gt;step-into&lt;/em&gt; em métodos. Ou seja, tudo que uma boa ferramenta de debug precisa ter.&lt;/p&gt;

&lt;h2&gt;Comandos&lt;/h2&gt;

&lt;p&gt;Antes de partirmos para prática, é importante conhecer alguns comandos básicos para já começar o uso do pdb de forma efetiva.&lt;/p&gt;

&lt;p&gt;Durante o debugging, eventualmente seu script irá &lt;em&gt;estacionar&lt;/em&gt; em pontos de paradas, possívelmente definidos por você, neste momento, os comandos a seguir poderão ser utilizados.&lt;/p&gt;

&lt;h3&gt;q (quit)&lt;/h3&gt;

&lt;p&gt;Sai da execução do script.&lt;/p&gt;

&lt;h3&gt;n (next)&lt;/h3&gt;

&lt;p&gt;Avança para a próxima linha do script.&lt;/p&gt;

&lt;h3&gt;p (print)&lt;/h3&gt;

&lt;p&gt;Executa o comando &lt;code&gt;print&lt;/code&gt; do python, por exemplo:&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;script&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="n"&gt;foo&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s2"&gt;&amp;quot;foo var&amp;quot;&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;p&lt;/span&gt; &lt;span class="n"&gt;foo&lt;/span&gt;

&lt;span class="s1"&gt;&amp;#39;foo var&amp;#39;&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;blockquote&gt;

&lt;p&gt;Vale ressaltar que no exemplo acima, não é necessário utilizar o comando &lt;code&gt;p&lt;/code&gt;, basta digitar o nome da variável e pressionar &lt;code&gt;enter&lt;/code&gt;, o efeito seria o mesmo.&lt;/p&gt;

&lt;/blockquote&gt;

&lt;h3&gt;c (continue)&lt;/h3&gt;

&lt;p&gt;Avança o debug até o próximo &lt;strong&gt;breakpoint&lt;/strong&gt; ou até ocorrer uma &lt;strong&gt;exception&lt;/strong&gt;.&lt;/p&gt;

&lt;h3&gt;l (list)&lt;/h3&gt;

&lt;p&gt;Lista algumas linhas do código que estão em volta da linha atual.

Por padrão serão apresentadas 11 linhas (5 acima e 5 abaixo).&lt;/p&gt;

&lt;h3&gt;s (step into)&lt;/h3&gt;

&lt;p&gt;Ao realizar a navegação através do comando &lt;code&gt;n&lt;/code&gt; o debug &lt;strong&gt;não&lt;/strong&gt; irá &lt;em&gt;entrar&lt;/em&gt; em métodos que possívelmente forem invocados.

Para que o debug entre no método que está sendo invocado na linha corrente, basta trocar o comando &lt;code&gt;n&lt;/code&gt;, pelo comando &lt;code&gt;s&lt;/code&gt;.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;foo&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;20&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="n"&gt;foo&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;bar&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="s1"&gt;&amp;#39;barz&amp;#39;&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;s&lt;/span&gt;

&lt;span class="o"&gt;--&lt;/span&gt;&lt;span class="n"&gt;Call&lt;/span&gt;&lt;span class="o"&gt;--&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;foo&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;3&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="n"&gt;bar&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;bar&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="n"&gt;the_bar&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;h3&gt;r (return)&lt;/h3&gt;

&lt;p&gt;Já o comando &lt;code&gt;r&lt;/code&gt; libera a execução do script até sair da função atual.&lt;/p&gt;

&lt;h3&gt;b (breakpoint)&lt;/h3&gt;

&lt;p&gt;Cria um breakpoint em uma determinada linha ou método, por exemplo.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;script&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;b&lt;/span&gt; &lt;span class="mi"&gt;21&lt;/span&gt;

&lt;span class="n"&gt;Breakpoint&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt; &lt;span class="n"&gt;at&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;script&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="mi"&gt;21&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;No comando acima, setamos um breakpoint na linha 21 de nosso script.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;script&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;b&lt;/span&gt; &lt;span class="n"&gt;foo&lt;/span&gt;

&lt;span class="n"&gt;Breakpoint&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt; &lt;span class="n"&gt;at&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;script&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="mi"&gt;30&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;Já no exemplo acima, setamos o breakpoint para o método &lt;code&gt;foo&lt;/code&gt;.

O pdb informa qual linha ele setou o breakpoint, em nosso exemplo o método &lt;code&gt;foo&lt;/code&gt; está na linha 30 do script.&lt;/p&gt;

&lt;h3&gt;a (arguments)&lt;/h3&gt;

&lt;p&gt;O comando &lt;code&gt;a&lt;/code&gt; mostra os argumentos que foram passados para a função atual.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;foo&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;20&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="n"&gt;foo&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;bar&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="s1"&gt;&amp;#39;barz&amp;#39;&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;s&lt;/span&gt;

&lt;span class="o"&gt;--&lt;/span&gt;&lt;span class="n"&gt;Call&lt;/span&gt;&lt;span class="o"&gt;--&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;foo&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;3&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="n"&gt;bar&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;bar&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="n"&gt;the_bar&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;a&lt;/span&gt;

&lt;span class="n"&gt;the_bar&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s2"&gt;&amp;quot;barz&amp;quot;&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;h3&gt;ENTER&lt;/h3&gt;

&lt;p&gt;Se você pressionar o &lt;code&gt;ENTER&lt;/code&gt; sem nenhum comando no pdb, ele irá repetir o último comando executado. &lt;/p&gt;

&lt;h2&gt;Debug na prática&lt;/h2&gt;

&lt;p&gt;Vamos utilizar um script python simples e didático como exemplo.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="k"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;NumberList&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;object&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="fm"&gt;__init__&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;list&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;add&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="n"&gt;number&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="ow"&gt;not&lt;/span&gt; &lt;span class="nb"&gt;isinstance&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;number&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;int&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nb"&gt;float&lt;/span&gt;&lt;span class="p"&gt;)):&lt;/span&gt;

&lt;span class="k"&gt;raise&lt;/span&gt; &lt;span class="ne"&gt;TypeError&lt;/span&gt;

&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;append&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;number&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;sum&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="n"&gt;result&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;

&lt;span class="k"&gt;for&lt;/span&gt; &lt;span class="n"&gt;i&lt;/span&gt; &lt;span class="ow"&gt;in&lt;/span&gt; &lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;

&lt;span class="n"&gt;result&lt;/span&gt; &lt;span class="o"&gt;+=&lt;/span&gt; &lt;span class="n"&gt;i&lt;/span&gt;

&lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="n"&gt;result&lt;/span&gt;

&lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="s2"&gt;&amp;quot;__main__&amp;quot;&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="vm"&gt;__name__&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;

&lt;span class="n"&gt;numbers&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="n"&gt;NumberList&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;add&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;5&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="k"&gt;assert&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;sum&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="mi"&gt;5&lt;/span&gt;

&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;add&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;10&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="k"&gt;assert&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;sum&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="mi"&gt;15&lt;/span&gt;

&lt;span class="nb"&gt;print&lt;/span&gt; &lt;span class="s2"&gt;&amp;quot;The End&amp;quot;&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;Esse script possui uma classe chamada &lt;code&gt;NumberList&lt;/code&gt; que armazena uma lista de numeros e retorna a soma deles.

Além destas classe, esse script também realiza algumas operações como instanciar essa classe e realizar alguns testes de asserção.

Salve esse script em um arquivo chamado &lt;code&gt;numbers.py&lt;/code&gt; para ser utilizado em nossos exemplos.&lt;/p&gt;

&lt;h2&gt;Modos de uso do pdb&lt;/h2&gt;

&lt;p&gt;Na prática o pdb se assemelha bastante ao prompt interativo do python, com a diferença dos caracteres identificadores.

Enquanto que no prompt interativo do python o identificador é o &lt;code&gt;&amp;gt;&amp;gt;&amp;gt;&lt;/code&gt;, no pdb o identificador é &lt;code&gt;(Pdb)&lt;/code&gt;.

Existem algumas maneiras de usar o pdb, depende da forma como você pretende realizer o debug. &lt;/p&gt;

&lt;h3&gt;pdb.py&lt;/h3&gt;

&lt;p&gt;Uma delas é através da chamada do script &lt;code&gt;pdb.py&lt;/code&gt; passando como paramêtro o script para ser feito do debug, por exemplo:&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;python -m pdb numbers.py

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;Isso fará com que o pdb seja iniciado na primeira linha do script &lt;code&gt;numbers.py&lt;/code&gt;, no caso, a declaração da classe &lt;code&gt;NumberList()&lt;/code&gt;.

Caso você execute o comando &lt;code&gt;n&lt;/code&gt;, a próxima linha será o &lt;code&gt;if "__main__" == __name__:&lt;/code&gt; e assim por diante.

Utilizando desta maneira, você pode verificar linha a linha do script ou &lt;em&gt;setar&lt;/em&gt; um breakpoint assim que entrar no debug, por exemplo, se você quer criar um breakpoint na execução do método &lt;code&gt;sum()&lt;/code&gt; de uma instância da classe &lt;code&gt;NumberList()&lt;/code&gt;, basta executar o comando &lt;code&gt;b numbers.sum&lt;/code&gt;.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;venv&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="nd"&gt;@machine&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="o"&gt;~/&lt;/span&gt;&lt;span class="err"&gt;$&lt;/span&gt; &lt;span class="n"&gt;python&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt;&lt;span class="n"&gt;m&lt;/span&gt; &lt;span class="n"&gt;pdb&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;4&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="k"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;NumberList&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;object&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;n&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;20&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="vm"&gt;__name__&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="s2"&gt;&amp;quot;__main__&amp;quot;&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;n&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;21&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="n"&gt;NumberList&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;n&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;23&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;add&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;5&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;b&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;sum&lt;/span&gt;

&lt;span class="n"&gt;Breakpoint&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt; &lt;span class="n"&gt;at&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="mi"&gt;13&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;Ou para simplificar, também poderiamos setar o breakpoint pelo número da linha.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;venv&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="nd"&gt;@machine&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="o"&gt;~/&lt;/span&gt;&lt;span class="err"&gt;$&lt;/span&gt; &lt;span class="n"&gt;python&lt;/span&gt; &lt;span class="o"&gt;-&lt;/span&gt;&lt;span class="n"&gt;m&lt;/span&gt; &lt;span class="n"&gt;pdb&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;4&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="n"&gt;module&lt;/span&gt;&lt;span class="o"&gt;&amp;gt;&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="k"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;NumberList&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;object&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="n"&gt;b&lt;/span&gt; &lt;span class="mi"&gt;13&lt;/span&gt;

&lt;span class="n"&gt;Breakpoint&lt;/span&gt; &lt;span class="mi"&gt;1&lt;/span&gt; &lt;span class="n"&gt;at&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="mi"&gt;13&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;h3&gt;pdb.set_trace()&lt;/h3&gt;

&lt;p&gt;Outra forma é utilizando o método &lt;code&gt;set_trace()&lt;/code&gt; do pacote &lt;code&gt;pdb&lt;/code&gt;.

Com o &lt;code&gt;pdb.set_trace()&lt;/code&gt; você pode definir onde será o seu breakpoint via código, por exemplo, faremos uma alteração em nosso script para setar um breakpoint no método &lt;code&gt;NumberList().sum()&lt;/code&gt;.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="k"&gt;class&lt;/span&gt; &lt;span class="nc"&gt;NumberList&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;object&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="fm"&gt;__init__&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="nb"&gt;list&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;add&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="n"&gt;number&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="ow"&gt;not&lt;/span&gt; &lt;span class="nb"&gt;isinstance&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;number&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;int&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nb"&gt;float&lt;/span&gt;&lt;span class="p"&gt;)):&lt;/span&gt;

&lt;span class="k"&gt;raise&lt;/span&gt; &lt;span class="ne"&gt;TypeError&lt;/span&gt;

&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;append&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;number&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;sum&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;

&lt;span class="kn"&gt;import&lt;/span&gt; &lt;span class="nn"&gt;pdb&lt;/span&gt;

&lt;span class="n"&gt;pdb&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;set_trace&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="n"&gt;result&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;

&lt;span class="k"&gt;for&lt;/span&gt; &lt;span class="n"&gt;i&lt;/span&gt; &lt;span class="ow"&gt;in&lt;/span&gt; &lt;span class="bp"&gt;self&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;

&lt;span class="n"&gt;result&lt;/span&gt; &lt;span class="o"&gt;+=&lt;/span&gt; &lt;span class="n"&gt;i&lt;/span&gt;

&lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="n"&gt;result&lt;/span&gt;

&lt;span class="sd"&gt;&amp;quot;&amp;quot;&amp;quot;&lt;/span&gt;

&lt;span class="sd"&gt;Resto do script omitido&lt;/span&gt;

&lt;span class="sd"&gt;&amp;quot;&amp;quot;&amp;quot;&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;Dessa forma, ao executar o script (sem a necessidade de ser via pdb) e passar pelo método &lt;code&gt;pdb.set_trace()&lt;/code&gt; será iniciado um prompt interativo do pdb.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;venv&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="nd"&gt;@machine&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="o"&gt;~/&lt;/span&gt;&lt;span class="err"&gt;$&lt;/span&gt; &lt;span class="n"&gt;python&lt;/span&gt; &lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;

&lt;span class="o"&gt;&amp;gt;&lt;/span&gt; &lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;home&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;user&lt;/span&gt;&lt;span class="o"&gt;/&lt;/span&gt;&lt;span class="n"&gt;numbers&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;py&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="mi"&gt;16&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="nb"&gt;sum&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="o"&gt;-&amp;gt;&lt;/span&gt; &lt;span class="n"&gt;result&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;0&lt;/span&gt;

&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;Pdb&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;h2&gt;ipdb&lt;/h2&gt;

&lt;p&gt;Uma das desvantagens do prompt interativo do python é a falta de &lt;em&gt;syntax highlighting&lt;/em&gt; e &lt;em&gt;code completion&lt;/em&gt;, com o pdb não é diferente, porém, assim como podemos recorrer ao &lt;a href="http://ipython.org/"&gt;ipython&lt;/a&gt; para isso, também podemos utilizar o &lt;a href="https://github.com/gotcha/ipdb"&gt;ipdb&lt;/a&gt;.

O &lt;code&gt;ipdb&lt;/code&gt; é uma espécie de wrapper para o pdb que faz uso das rotinas de debug do &lt;code&gt;IPython&lt;/code&gt;.

A maneira de uso se assemelha bastante ao pdb, bastando trocar o pacote &lt;code&gt;pdb&lt;/code&gt; pelo pacote &lt;code&gt;ipdb&lt;/code&gt;.&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="kn"&gt;import&lt;/span&gt; &lt;span class="nn"&gt;ipdb&lt;/span&gt;

&lt;span class="n"&gt;foo&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s2"&gt;&amp;quot;foo&amp;quot;&lt;/span&gt;

&lt;span class="n"&gt;ipdb&lt;/span&gt;&lt;span class="o"&gt;.&lt;/span&gt;&lt;span class="n"&gt;set_trace&lt;/span&gt;&lt;span class="p"&gt;()&lt;/span&gt;

&lt;span class="n"&gt;bar&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s2"&gt;&amp;quot;bar&amp;quot;&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;Para instalar o ipdb basta utilizar o &lt;code&gt;pip&lt;/code&gt;&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre&gt;&lt;span&gt;&lt;/span&gt;&lt;span class="err"&gt;pip install ipdb&lt;/span&gt;

&lt;/pre&gt;&lt;/div&gt;

&lt;p&gt;Com certeza recomendo o uso do &lt;code&gt;ipdb&lt;/code&gt; principalmente por ser mais intuitivo.&lt;/p&gt;

&lt;p&gt;&lt;strong&gt;Referências&lt;/strong&gt;&lt;br \&gt;

&lt;a href="https://docs.python.org/2/library/pdb.html"&gt;Documentação Oficial&lt;/a&gt;&lt;br /&gt;

&lt;a href="https://github.com/gotcha/ipdb"&gt;ipdb&lt;/a&gt;&lt;/p&gt;</content><category term="python"></category><category term="pdb"></category><category term="ipython"></category><category term="ipdb"></category><category term="debugging"></category></entry></feed>