[Python basic]010.os Module (2)

OS Modules (2)

• Introduced
• Os
  • Constant
  • Path
  • Determining Path Properties
  • Path transformation
  • File properties
  • Same file

Introduced

- os.path module, the main processing 路径操作 , contains a variety of processing files and file name method.

Os.path Constants

• os.path.sepPath Delimiter (Unix for / , win for \\ )
• os.path.pathsepDelimiter between multiple paths, more for environment variables (Unix for : , win for ; )
• os.path.extsepThe suffix name symbol is typically.

Path

• os.path.splitSplit path to directory name and file name
• os.path.dirnameDirectory Name
• os.path.basenameFilename
• os.path.splitextSplit path to file and extension
• os.path.joinPath combination

Code

ImportOsfilename='/users/superdo/test.txt'#Split Path_dir, _file =os.path.split (filename)Print_dir#/users/superdoPrint_file#Test.txt#Directory namePrintOs.path.dirname (filename)#/users/superdo#file namePrintOs.path.basename (filename)#Test.txt#Extended Name_filename, _ext =os.path.splitext (filename)Print_filename#/users/superdo/testPrint_ext#. txt#Path Combinationf = Os.path.join ('Users','Superdo','Test.txt')PrintF#Users/superdo/test.txt

Determining Path Properties

• os.path.existsWhether the file exists
• os.path.isdirWhether it is a directory
• os.path.isfileWhether it is a file
• os.path.islinkis the connection file
• os.path.ismountWhether to mount the file
• os.path.isabsis the absolute path

Code

ImportOsfilename='/users/superdo/test.txt'Printos.path.exists (filename)#Judging existencePrintOs.path.isdir (filename)#Judging folderPrintOs.path.isfile (filename)#Judging FilesPrintOs.path.islink (filename)#Determine the connection filePrintOs.path.ismount (filename)#Determining Mount FilesPrintOs.path.isabs (filename)#Determine absolute path

Path transformation

• os.path.relpathRelative path
• os.path.abspathAbsolute path
• os.path.normpathStandardized paths
• os.path.commonprefixGet a common path

Code

ImportOsfilename='/users/superdo/ac/. /path.txt'#Get relative pathPrintOs.path.relpath (filename)#gets the path relative to the current pathPrintOs.path.relpath (filename,'/users')#get the path relative to/users#Absolute PathPrintos.path.abspath (filename)#Standardized PathsPrintos.path.normpath (filename)#get a common path in multiple pathsF1='/users/superdo/zergling/file.txt'F2='/users/superdo/ac/file.txt'f3='/users/superdo/horse/file.txt'PrintOs.path.commonprefix ([F1, F2, F3])#/users/superdo/

File properties

• os.path.getatimeAccess time (obtained from Os.stat)
• os.path.getmtimeModification time (obtained from Os.stat)
• os.path.getctimeCreation time (obtained from Os.stat)
• os.path.getsizeFile size (obtained from Os.stat)

Code

Import OS Import  '/users/superdo/test.txt'print  os.path.getatime (filename) Print os.path.getmtime (filename) Print os.path.getctime (filename) print os.path.getsize (filename)

Same file

• os.path.samefileCompare files
• os.path.sameopenfileCompare open files
• os.path.samestatCompare Files Stat

Code

Import'/users/superdo/file.txt'/users/superdo/ File.txt'print== Open (F2)print=  = os.stat (f2)print os.path.samestat (FS1, FS2)

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Reprinted from "Baby bus Superdo Team" original link: http://www.cnblogs.com/superdo/p/4719191.html

[Python basic]010.os Module (2)