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61 lines
2.7 KiB
Markdown
61 lines
2.7 KiB
Markdown
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# OS Cheat Sheet
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```python
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os.curdir # stringa identificante cartella corrente ("." per WIN)
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os.pardir # stringa identificante cartella genitore (".." per WIN)
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os.sep # carattere separatore in path (\\ per WIN, / per POSIX)
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os.extsep # carattere separatore estensione file (".")
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os.pathsep # carattere separatore in ENVVAR PATH (";" per WIN, ":" per POSIX)
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os.linesp # stringa usata per separare linee (\r\n per WIN, \n per POSIX)
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os.system("command") # execute command in shell
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os.remove(path) # cancella il file indicato da path
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os.rmdir(path) # cancella cartella indicata da path
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os.listdir(path) # restituisce lista nomi dei contenuti cartella
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os.path.exists(path) # True se path si riferisce ad elemento esistente
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os.path.split() # divide path in (head, tail), head + tail == path
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os.path.splitdrive(path) # divide path in (drive, tail), drive + tail == path
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os.path.splitext() # divide path in (root, ext), root + ext == path
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os.path.dirname(path) # restituisce nome cartella (path head)
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os.path.getatime(path) # restituisce data ultimo accesso
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os.path.getmtime(path) # restituisce data ultima modifica
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os.path.getsize(path) # restituisce dimesione in bytes (OSError se file inaccessibile o inesistente)
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os.path.isfile(path) # True se path è file esistente
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os.path.isdir(path) # True se path è cartella esistente
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os.path.join(path, *paths) # concatena vari path
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os.path.realpath(path) # Return the canonical path of the specified filename, eliminating symbolic links
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os.path.relpath(path, start=os.curdir) # restituisce path relativo (start opzionale, default os.curdir)
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os.path.abspath(path) # return a normalized absolutized version of the pathname path
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# collapses redundant separators and up-level references so that A//B, A/B/, A/./B and A/foo/../B all become A/B
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os.walk(top)
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# Generate the file names in a directory tree by walking the tree either top-down or bottom-up.
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# For each directory in the tree rooted at directory top (including), it yields a 3-tuple (dirpath, dirnames, filenames).
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# dirpath is a string, the path to the directory.
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# dirnames is a list of the names of the subdirectories in dirpath (excluding '.' and '..').
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# filenames is a list of the names of the non-directory files in dirpath.
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```
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## Folder Operations
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```python
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os.getcwd() # Return a string representing the current working directory
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os.chdir(path) # change the current working directory to path
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os.mkdir(path, mode=0o777) # Create a directory named path with numeric mode MODE.
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os.makedirs(name, mode=0o777) # Recursive directory creation
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```
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## Exceptions
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```python
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IsADirectoryError # file operation requested on directory
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NotADirectoryError # directory operation requested on file
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```
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