November 2025
Intermediate to advanced
1172 pages
46h 25m
Portuguese (Portugal, Brazil)
Content preview from Aprendendo Python (Portuguese Edition), 1st Edition
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Capítulo 14. Iterações e compreensões
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No capítulo anterior, conhecemos as duas instruções de loop do Python, ` while ` e ` for`. Embora elas possam lidar com a maioria das tarefas repetitivas que os programas precisam fazer, iterar sobre coleções é tão comum e difundido que o Python oferece ferramentas adicionais para tornar isso mais simples e eficiente. Este capítulo começa nossa exploração dessas ferramentas de compreensão ( ). Especificamente, ele apresenta o protocolo de iteração do Python, um modelo de chamada de método usado pelo loop for, e preenche alguns detalhes sobre compreensões, que são parentes próximos do loop for que aplicam uma expressão a cada item em uma coleção.
Como essas ferramentas estão relacionadas tanto ao loop for quanto às funções, vamos adotar uma abordagem em duas etapas para abordá-las neste livro — juntamente com uma nota final:
Este capítulo apresenta seus fundamentos no contexto de ferramentas baseadas em loops, servindo como uma continuação do capítulo anterior.
O Capítulo 20 revisita esses conceitos no contexto das ferramentas baseadas em funções e amplia o tópico para incluir geradores embutidos e definidos pelo usuário.
O Capítulo 30 traz uma conclusão mais curta pra essa história, mostrando como codificar objetos iteráveis definidos pelo usuário com classes.
Uma observação inicial: alguns dos conceitos apresentados nestes ...
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