September 2025
Intermediate to advanced
660 pages
13h 38m
Portuguese (Portugal, Brazil)
Content preview from Introdução ao Python, 3rd Edition
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Capítulo 6. If e Match
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Se você conseguir manter a cabeça fria quando todos ao seu redor estiverem perdendo a cabeça e colocando a culpa em você, ...
Rudyard Kipling, "If-"
Nos capítulos anteriores, você viu muitos exemplos de dados, mas não fez muito com eles. A maioria dos exemplos de código usava o interpretador interativo e era curta. Neste capítulo, você aprenderá a estruturar o código Python, não apenas os dados.
Muitas linguagens de computador usam caracteres como chaves ({ e }) ou palavras-chave comobegin e endpara marcar seções de código. Nessas linguagens, é uma boa prática usar indentação consistente para tornar o programa mais legível para você e para os outros. Existem até mesmo ferramentas para alinhar bem o código.
Quando estava projetando a linguagem que se tornou o Python, Guido van Rossum decidiu que a indentação em si era suficiente para definir a estrutura de um programa e evitou digitar todos aqueles parênteses e chaves. O Python é incomum nesse uso de espaços em brancopara definir a estrutura do programa. É um dos primeiros aspectos que os recém-chegados notam e pode parecer estranho para aqueles que têm experiência com outras linguagens. Acontece que, depois de escrever Python por algum tempo, essa estrutura parece natural e você para de notá-la. Você até se acostuma a fazer mais e digitar menos.
Nossos exemplos iniciais de código foram ...
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