March 2025
Intermediate to advanced
1172 pages
47h 52m
Spanish
Content preview from Aprender Python, 6.ª edición
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Capítulo 11. Asignaciones, expresiones e impresiones
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Ahora que ya hemos tenido una primera introducción a la sintaxis de las sentencias de Python, este capítulo comienza nuestro recorrido en profundidad por las sentencias específicas de Python. Empezaremos por lo básico: sentencias de asignación, sentencias de expresión y operaciones de impresión. Ya hemos visto todas ellas en acción, pero aquí completaremos detalles importantes que nos hemos saltado hasta ahora. Aunque son relativamente sencillas, como verás, existen variaciones opcionales para cada uno de estos tipos de sentencias que te resultarán útiles cuando empieces a escribir programas Python realistas.
Asignaciones
Llevamos tiempo utilizando la sentencia de asignación de Python para retener objetos en los ejemplos. En su forma básica, escribes el objetivo de una asignación a la izquierda de un signo igual, y el objeto a asignar a la derecha. El objetivo de la izquierda puede ser un nombre o un componente de objeto, y el objeto de la derecha puede ser una expresión arbitraria que cree un objeto. En su mayor parte, las asignaciones son sencillas, pero hay que tener en cuenta algunas propiedades clave:
Las asignaciones crean referencias a objetos. Como se explicó en el Capítulo 6, las asignaciones de Python almacenan referencias a objetos en nombres o componentes de estructuras de datos. Siempre crean
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