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wiki2:python:basic
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| Ambos lados, revisión anterior Revisión previa Próxima revisión | Revisión previa | ||
|
wiki2:python:basic [2019/07/18 07:54] alfred [Paths] |
wiki2:python:basic [2021/09/12 14:16] (actual) |
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| Línea 102: | Línea 102: | ||
| cwd = os.getcwd() | cwd = os.getcwd() | ||
| </code> | </code> | ||
| - | File name from a path: | + | |
| - | <code> | + | Script relative path: |
| - | os.path.basename(value) | + | |
| - | </code> | + | |
| - | Script full path: | + | |
| <code> | <code> | ||
| __file__ | __file__ | ||
| </code> | </code> | ||
| - | Get the path of a file (the folder where it is): | + | |
| + | Get the relative path of a file (the folder where it is): | ||
| <code> | <code> | ||
| os.path.dirname(__file__) | os.path.dirname(__file__) | ||
| + | </code> | ||
| + | |||
| + | ''os.path.abspath'': Get the absolute path: | ||
| + | <code> | ||
| + | os.path.abspath(the_relative_path) | ||
| + | </code> | ||
| + | |||
| + | ''os.path.dirname'': The parent path of the folder\file: | ||
| + | <code> | ||
| + | print(root) | ||
| + | print(os.path.dirname(root)) | ||
| + | /home/alfred/Desktop/presentesNOW/ReDesktop-SUBJECTS/Kibbutz | ||
| + | /home/alfred/Desktop/presentesNOW/ReDesktop-SUBJECTS | ||
| + | </code> | ||
| + | |||
| + | ''os.path.basename'': The file\folder name: | ||
| + | <code> | ||
| + | print(root) | ||
| + | print(os.path.basename(root)) | ||
| + | /home/alfred/Desktop/presentesNOW/ReDesktop-SUBJECTS/Kibbutz | ||
| + | Kibbutz | ||
| </code> | </code> | ||
| ===== Implementar tu propio Context Manager ===== | ===== Implementar tu propio Context Manager ===== | ||
| Línea 133: | Línea 152: | ||
| </code> | </code> | ||
| + | |||
| + | ===== Ejecutar comandos y leer ===== | ||
| + | |||
| + | Ejecuta el comando, mostrando su salida, y devuelve un int. | ||
| + | <code> | ||
| + | import os | ||
| + | os.system('ls -l') | ||
| + | </code> | ||
| + | <code> | ||
| + | import os | ||
| + | stream = os.popen('echo Returned output') | ||
| + | output = stream.read() | ||
| + | output | ||
| + | </code> | ||
| ===== Crear procesos ===== | ===== Crear procesos ===== | ||
| Crear un proceso y leer lo que sale por pantalla: | Crear un proceso y leer lo que sale por pantalla: | ||
| Línea 192: | Línea 225: | ||
| </code> | </code> | ||
| + | |||
| + | ===== SETS ===== | ||
| + | <code python> | ||
| + | >>> my_set = set("patata") | ||
| + | >>> my_set | ||
| + | {'p', 't', 'a'} | ||
| + | </code> | ||
| + | <code python> | ||
| + | >>> united_set = first_set.union(second_set) | ||
| + | >>> united_set | ||
| + | {'two', 'banana', 'three', 'peach', 'orange', 'one'} | ||
| + | ... | ||
| + | >>> first_set = {'one', 'two', 'three'} | ||
| + | >>> second_set = {'orange', 'banana', 'peach', 'one'} | ||
| + | >>> first_set.intersection(second_set) | ||
| + | {'one'} | ||
| + | ... | ||
| + | >>> first_set = {'one', 'two', 'three'} | ||
| + | >>> second_set = {'three', 'four', 'one'} | ||
| + | >>> first_set.difference(second_set) | ||
| + | {'two'} | ||
| + | >>> second_set.difference(first_set) | ||
| + | {'four'} | ||
| + | </code> | ||
wiki2/python/basic.1563436453.txt.gz · Última modificación: 2020/05/09 09:24 (editor externo)
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