September 2024
Intermediate to advanced
1648 pages
52h 56m
Spanish
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Apéndice B. El lanzador de Python 3.3 para Windows
Este apéndice describe el nuevo lanzador de Windows para Python, instalado con Python 3.3 automáticamente, y disponible por separado en la Web para su uso con versiones anteriores. Este nuevo lanzador proporciona una capa extra de código que elige e inicia un Python instalado. Aunque tiene algunos inconvenientes, el lanzador proporciona una coherencia muy necesaria para la ejecución de programas cuando coexisten varios Python en el mismo ordenador.
He escrito esta página para programadores que utilizan Python en Windows. Aunque es específica de la plataforma por naturaleza, está dirigida tanto a los principiantes en Python (la mayoría de los cuales se inician en esta plataforma), como a los desarrolladores de Python que escriben código para trabajar de forma portable entre Windows y Unix. Como veremos, el nuevo lanzador cambia las reglas en Windows lo bastante radicalmente como para afectar a todos los que utilizan Python en Windows, o puedan hacerlo en el futuro.
El legado de Unix
Para comprender plenamente los protocolos del lanzador , tenemos que empezar con una breve lección de historia. Los desarrolladores de Unix idearon hace tiempo un protocolo para designar un programa que ejecute el código de un script. En los sistemas Unix (incluidos Linux y Mac OS X), la primera línea del archivo de texto de un script es especial si comienza con una secuencia de dos caracteres: #!, a veces llamada shebang (una frase discutiblemente tonta ...
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