November 2024
Intermediate to advanced
456 pages
11h 58m
French
Content preview from Maîtriser Python pour la bioinformatique
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Chapitre 8. Trouver un motif dans l'ADN : Explorer la similarité des séquences
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Dans le cadre du défi Rosalind SUBS, je vais rechercher toutes les occurrences d'une séquence à l'intérieur d'une autre. Une sous-séquence partagée peut représenter un élément conservé tel qu'un marqueur, un gène ou une séquence régulatrice. Les séquences conservées entre deux organismes peuvent suggérer une caractéristique héritée ou convergente.
Je vais voir comment écrire une solution à l'aide de la classe str (string) de Python et je vais comparer les strings aux listes. Ensuite, je vais voir comment exprimer ces idées à l'aide de fonctions d'ordre supérieur et je vais poursuivre la discussion sur les k-mers que j'ai commencée au chapitre 7. Enfin, je vais montrer comment les expressions régulières peuvent trouver des motifs et je vais souligner les problèmes liés aux correspondances qui se chevauchent.
Dans ce chapitre, je vais te faire une démonstration :
-
Comment utiliser
str.find(),str.index(), et les tranches de chaîne -
Comment utiliser les ensembles pour créer des collections uniques d'éléments ?
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Comment combiner des fonctions d'ordre supérieur
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Comment trouver des sous-séquences à l'aide de k-mers
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Comment trouver des séquences qui se chevauchent éventuellement à l'aide d'expressions régulières ?
Pour commencer
Le code et les tests de ce chapitre se ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.