March 2025
Intermediate to advanced
1172 pages
47h 52m
Spanish
Content preview from Aprender Python, 6.ª edición
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Capítulo 8. Listas y diccionarios
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Ahora que ya hemos explorado los números y las cadenas, este capítulo pasa a ofrecer toda la información sobre los objetos lista y diccionario de Python: colecciones de otros objetos y los principales caballos de batalla de casi todos los scripts de Python. Como verás, ambos son extraordinariamente flexibles: pueden modificarse in situ, pueden crecer y reducirse a voluntad, y pueden contener y estar anidados en cualquier otro tipo de objeto. Aprovechando estos tipos de objeto incorporados, puedes crear y procesar ricas estructuras de información en tus scripts sin tener que definir nuevos tipos de objeto propios.
Listas
La primera parada en el recorrido de este capítulo es la lista de Python. Las listas son el tipo de objeto colección ordenada más flexible de Python. A diferencia de las cadenas, las listas pueden contener cualquier tipo de objeto: números, cadenas e incluso otras listas. Además, a diferencia de las cadenas, las listas pueden modificarse in situ mediante asignaciones a desplazamientos y cortes, llamadas a métodos de listas, sentencias de borrado, etc.: son objetos mutables.
Las listas de Python hacen el trabajo de muchas de las estructuras de datos de colección que podrías tener que implementar manualmente en lenguajes de bajo nivel, como C. He aquí un rápido vistazo a sus principales propiedades. Las listas de ...
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