September 2024
Intermediate to advanced
1648 pages
52h 56m
Spanish
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Capítulo 34. Detalles de la codificación de excepciones
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En el capítulo anterior echamos un vistazo rápido en a las sentencias relacionadas con las excepciones en acción. Aquí vamos a profundizar un poco más: este capítulo proporciona una introducción más formal a la sintaxis del procesamiento de excepciones en Python. En concreto, exploraremos los detalles de las sentencias try, raise, assert y with. Como veremos, aunque estas sentencias son en su mayoría sencillas, ofrecen potentes herramientas para tratar condiciones excepcionales en el código Python.
Nota
Una nota de procedimiento por adelantado: La historia de las excepciones ha cambiado de forma importante en los últimos años. A partir de Python 2.5, la cláusula finally puede aparecer en la misma sentencia try que las cláusulas except y else (antes no podían combinarse). Además, a partir de Python 3.0 y 2.6, la nueva sentencia with gestor de contexto se ha hecho oficial, y las excepciones definidas por el usuario deben codificarse ahora como instancias de clase, que deben heredar de una superclase de excepción incorporada. Además, 3.X presenta una sintaxis ligeramente modificada para la sentencia raise y las cláusulas except, algunas de las cuales están disponibles en 2.6 y 2.7.
En esta edición me centraré en el estado de las excepciones en las versiones recientes de Python 2.X y 3.X, pero como es muy probable que ...
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