November 2024
Intermediate to advanced
1014 pages
27h 21m
French
Content preview from Fluent Python, 2ème édition
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Chapitre 4. Texte Unicode et octets
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Les humains utilisent du texte. Les ordinateurs parlent en octets.
Esther Nam et Travis Fischer, "Codage des caractères et Unicode en Python".1
Python 3 a introduit une distinction nette entre les chaînes de texte humain et les séquences d'octets bruts. La conversion implicite des séquences d'octets en texte Unicode appartient au passé. Ce chapitre traite des chaînes Unicode, des séquences binaires et des codages utilisés pour les convertir.
Selon le type de travail que tu fais avec Python, tu peux penser que la compréhension de l'Unicode n'est pas importante. C'est peu probable, mais de toute façon, il n'y a pas moyen d'échapper au clivage str versus byte. En prime, tu découvriras que les types de séquences binaires spécialisés offrent des caractéristiques que le type "tout usage" de Python 2 str n'avait pas.
En ce chapitre, nous visiterons les sujets suivants :
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Caractères, points de code et représentations d'octets
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Caractéristiques uniques des séquences binaires :
bytes,bytearray, etmemoryview -
Encodages pour tous les jeux de caractères Unicode et anciens
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Éviter et traiter les erreurs d'encodage
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Meilleures pratiques lors de la manipulation de fichiers texte
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Le piège de l'encodage par défaut et les problèmes d'E/S standard
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Comparaisons sûres de textes Unicode avec normalisation
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Fonctions d'utilité ...
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