March 2025
Intermediate to advanced
1172 pages
47h 52m
Spanish
Content preview from Aprender Python, 6.ª edición
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Capítulo 14. Iteraciones y comprensiones
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En el capítulo anterior, conocimos las dos sentencias de bucle de Python, while y for. Aunque pueden manejar la mayoría de las tareas repetitivas que los programas necesitan realizar, iterar sobre colecciones es tan común y omnipresente que Python proporciona herramientas adicionales para hacerlo más sencillo y eficiente. Este capítulo comienza nuestra exploración de estas herramientas . En concreto, presenta el protocolo de iteración de Python, un modelo de llamada a métodos utilizado por el bucle for, y aporta algunos detalles sobre las comprensiones, que son un primo cercano del bucle for que aplica una expresión a cada elemento de una colección.
Dado que estas herramientas están relacionadas tanto con el bucle for como con las funciones, adoptaremos un enfoque de dos pasadas para cubrirlas en este libro, junto con un epílogo:
Este capítulo presenta sus fundamentos en el contexto de las herramientas basadas en bucles, sirviendo como una especie de continuación del capítulo anterior.
El capítulo 20 vuelve a tratarlos en el contexto de las herramientas basadas en funciones, y amplía el tema para incluir los generadores incorporados y los definidos por el usuario.
El capítulo 30 ofrece una última entrega más breve de esta historia, que nos mostrará cómo codificar objetos iterables definidos por el usuario con clases.
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