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 38. Atributosgerenciados
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Este capítulo aprofunda as técnicas de interceptação de atributos apresentadas anteriormente, introduz outra técnica e as utiliza em alguns exemplos maiores. Como tudo nesta parte do livro, este capítulo é classificado como um tópico avançado e leitura opcional, porque a maioria dos programadores de aplicativos não precisa se preocupar com o material discutido aqui — eles podem buscar e definir atributos em objetos sem se preocupar com as implementações dos atributos.
No entanto, especialmente para criadores de ferramentas, gerenciar o acesso a atributos pode ser uma parte importante de APIs flexíveis. Além disso, a compreensão do modelo descritor abordado aqui pode tornar ferramentas relacionadas, como slots e propriedades, mais tangíveis e pode até ser leitura obrigatória se aparecer no código que você precisa usar.
Por que gerenciar atributos?
Os atributos de objetos são essenciais para a maioria dos programas Python — é onde geralmente armazenamos informações sobre as entidades que nossos scripts processam. Normalmente, os atributos são simplesmente nomes para objetos; o atributo name de uma pessoa, por exemplo, pode ser uma string simples, obtida e definida com a sintaxe básica de atributos:
person.name# Fetch attribute valueperson.name = value# Change attribute value
Na maioria dos casos, o atributo reside no próprio ...
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