September 2024
Intermediate to advanced
1648 pages
52h 56m
Spanish
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Capítulo 30. Sobrecarga de operadores
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Este capítulo continúa nuestro estudio en profundidad de la mecánica de las clases centrándose en la sobrecarga de operadores. En los capítulos anteriores hemos tratado brevemente la sobrecarga de operadores; aquí daremos más detalles y examinaremos un puñado de métodos de sobrecarga de uso común. Aunque no demostraremos cada uno de los muchos métodos de sobrecarga de operadores disponibles, los que codificaremos aquí son una muestra lo suficientemente representativa como para descubrir las posibilidades de esta característica de las clases Python.
Lo básico
En realidad, "sobrecargar operadores" significa simplemente interceptar las operaciones incorporadas en en los métodos de una clase: Python invoca automáticamente tus métodos cuando aparecen instancias de la clase en las operaciones incorporadas, y el valor de retorno de tu método se convierte en el resultado de la operación correspondiente. Aquí tienes un repaso de las ideas clave de la sobrecarga:
La sobrecarga de operadores permite a las clases interceptar operaciones normales de Python.
Las clases pueden sobrecargar todos los operadores de expresión de Python.
Las clases también pueden sobrecargar las operaciones incorporadas, como la impresión, las llamadas a funciones, el acceso a atributos, etc.
La sobrecarga hace que las instancias de clase actúen más como tipos incorporados. ...
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