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Las cadenas 3 Día 5, 24 ene 14

Las cadenas 3 Día 5, 24 ene 14. Cultura computacional en español SPAN 4350 Harry Howard Tulane University. Organizaci ón del curso. Las grabaciones y las presentaciones están disponibles en: http://www.tulane.edu/~howard/SPAN-NLP/

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Las cadenas 3 Día 5, 24 ene 14

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  1. Las cadenas 3Día 5, 24 ene 14 Cultura computacional en español SPAN 4350 Harry Howard Tulane University

  2. Organización del curso • Las grabaciones y las presentaciones están disponibles en:http://www.tulane.edu/~howard/SPAN-NLP/ • La versión en inglés del tema es http://www.tulane.edu/~howard/CompCultES/strings.html SPAN 4350 - Harry Howard - Tulane University

  3. Repaso SPAN 4350 - Harry Howard - Tulane University

  4. Métodos C = 'otolaringologo' >>> len(C) >>> sorted(C) >>> set(C) >>> C+'!' >>> C*2 >>> C.count('o') >>> C.index('o') >>> C.rindex('o') >>> C.find('o') >>> C.rfind('o') >>> C.lower() >>> C.upper() >>> C.swapcase() >>> C.capitalize() >>> C.title() >>> C.replace('t','m') >>> C.strip('o') SPAN 4350 - Harry Howard - Tulane University

  5. Un diagrama de la indezación SPAN 4350 - Harry Howard - Tulane University

  6. Sintaxis • atributo.metodo(argumento) • find/index(cadena, principio, fin) • cadena[principio:fin] SPAN 4350 - Harry Howard - Tulane University

  7. Abran Python. cadenas SPAN 4350 - Harry Howard - Tulane University

  8. ¿Cuál es la diferencia entre find() y index()? >>> C.find('otto') -1 >>> C.index('otto') Traceback (mostrecentcalllast): File "<stdin>", line 1, in <module> ValueError: substring not found SPAN 4350 - Harry Howard - Tulane University

  9. El corte extendido >>> CC = 'ABCDEFGH' >>> CC[::1] >>> CC[::2] >>> CC[::3] >>> CC[::4] >>> CC[1:7:1] >>> CC[1:7:2] >>> CC[1:7:3] >>> CC[1:7:6] cadena[principio:fin:paso] SPAN 4350 - Harry Howard - Tulane University

  10. Poner una cadena al revés >>> CC[::-1] >>> CC[::-2] >>> CC[::-3] >>> CC[::-4] SPAN 4350 - Harry Howard - Tulane University

  11. Todas son cadenas >>> C = 'ABCDEFGH' >>> c = 'abcdefgh' >>> C[:3].lower() >>> c[:3].upper() >>> C[:3].capitalize() >>> C[:3].capitalize().upper() >>> c[:3].capitalize().lower() >>> (c[:4].upper()+C[4:].lower()).swapcase() SPAN 4350 - Harry Howard - Tulane University

  12. Práctica • C = 'abcdefg' • Conviertan C en 'ABCD'. • C[:4].upper() • Conviertan C en 'abWXYfg'. • C.replace('cde','WXY') • Conviertan C en 'HgFeDcBa'. • 'H'+C.replace(C,'aBcDeFg')[::-1] SPAN 4350 - Harry Howard - Tulane University

  13. P1 como tarea en casa: se lo voy a mandar por correo electrónico. Terminar cadenas y empezar Unicode. El próximo díaTráete el portátil a clase. SPAN 4350 - Harry Howard - Tulane University

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