April 2025
Intermediate to advanced
380 pages
10h 16m
Portuguese (Portugal, Brazil)
Content preview from Python robusto
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Capítulo 10. Tipos definidos pelo utilizador: Classes
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As classes serão o último tipo definido pelo utilizador que irei abordar neste livro. Muitos desenvolvedores aprendem classes cedo, e isso é tanto uma vantagem quanto uma desvantagem. As classes são usadas em muitas frameworks e bases de código, por isso compensa seres fluente no design de classes. No entanto, quando os desenvolvedores aprendem classes muito cedo, eles perdem a nuance de quando e, mais importante, quando não usá-las.
Pensa na tua utilização de classes. Em vez disso, poderias representar esses dados como dataclass? E que tal um conjunto de funções livres? Já vi muitas bases de código que usam classes em todo o lado quando não deviam, e a manutenção é prejudicada por isso.
No entanto, também já me deparei com bases de código que oscilam o pêndulo para o outro lado: não utilizam quaisquer classes. Isto também afecta a manutenção; é fácil quebrar pressupostos e ter dados inconsistentes. Em Python, deves procurar um equilíbrio. As classes têm um lugar na tua base de código, mas é importante reconhecer os seus pontos fortes e fracos. Está na altura de ires a fundo, pores de lado os teus preconceitos e aprenderes como as classes te ajudam a criar código mais robusto.
Anatomia da aula
As classes destinam-se a ser outra forma de agrupar dados relacionados. Têm décadas de história no paradigma orientado ...
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