Python OS Module

  #OS Module
#The OS module is the operation of the operating system, which must first be imported into the module:ImportOS#GETCWD () Gets the current working directory (the current working directory is the folder in which the current file is located by default)result =OS.GETCWD ()Print(Result)#chdir () change the current working directoryOs.chdir ('/home/sy') Result=OS.GETCWD ()Print(Result) open ('02.txt','W')#when you write a full path, you do not need to consider the problem of the default working directory and follow the actual writing path.Open'/home/sy/Download/02.txt','W')#Listdir () gets a list of names for all content in the specified folderresult = Os.listdir ('/home/sy')Print(Result)#mkdir () Creating a folder#os.mkdir (' Girls ')#os.mkdir (' Boys ', 0o777)#makedirs () to create a folder recursively#os.makedirs ('/home/sy/a/b/c/d ')#rmdir () Delete empty directory#os.rmdir (' Girls ')#removedirs Recursive Delete folder must be empty directory#os.removedirs ('/home/sy/a/b/c/d ')#rename () file or folder rename#os.rename ('/home/sy/a ', '/home/sy/alibaba '#os.rename (' 02.txt ', ' 002.txt ')#stat () Get information about a file or folder#result = Os.stat ('/home/sy/pycharmproject/python3/10.27/01.py)#print (Result)#system () Execution Systems Command (dangerous function)#result = Os.system (' ls-al ') #获取隐藏文件#print (Result)#Environment Variables" "an environment variable is a collection of commands that are set by the operating system environment variable is the set of directories that the operating system searches for commands when executing system commands" "#getenv () Gets the environment variables of the systemresult = Os.getenv ('PATH')Print(Result.split (':'))#putenv () adds a directory to the environment variable (temporary increase is only valid for the current script)#os.putenv (' PATH ', '/home/sy/download ')#os.system (' syls ')#Exit () command to exit the terminal#common values in the OS module#CurDir represents the current folder. Indicates that the current folder can be omitted in generalPrint(Os.curdir)#Pardir represents the previous level of folder: Indicates that the previous level folder must not be omitted!Print(Os.pardir)#Os.mkdir ('.. /.. /.. /man ') #相对路径 search starting from the current directory#os.mkdir ('/home/sy/man1 ') #绝对路径 find from the root directory#Name gets a string of names that represent the operating systemPrint(Os.name)#POSIX-Linux or Unix System NT-Window System#Sep gets system path interval symbol window->\ linux->/Print(OS.SEP)#Extsep Get the interval between file name and Suffix window & Linux.Print(OS.EXTSEP)#Linesep get the line break symbol for the operating system window, \ r \ n Linux/unixPrint(repr (os.linesep))#Import OS moduleImportOS#The following are the contents of the Os.path submodule#Abspath () converts a relative path to an absolute pathPath ='./boys'#relativeresult =Os.path.abspath (path)Print(Result)#dirname () get the full path to the directory section & BaseName () Get the main part of the full pathPath ='/home/sy/boys'result=os.path.dirname (path)Print(Result) result=os.path.basename (path)Print(Result)#split () cuts a complete path into the table of contents and body partsPath ='/home/sy/boys'result=os.path.split (path)Print(Result)#join () merges 2 paths into oneVAR1 ='/home/sy'var2='000.py'result=Os.path.join (VAR1,VAR2)Print(Result)#Splitext () cuts a path into a file suffix and two other parts, primarily for obtaining the suffix of a filePath ='/home/sy/000.py'result=os.path.splitext (path)Print(Result)#GetSize () Gets the size of the file#path = '/home/sy/000.py '#result = os.path.getsize (path)#print (Result)#isfile () detects if it is a filePath ='/home/sy/000.py'result=os.path.isfile (path)Print(Result)#Isdir () detects if it is a folderresult =os.path.isdir (path)Print(Result)#Islink () detect if it is a linkPath ='/initrd.img.old'result=os.path.islink (path)Print(Result)#Getctime () Gets the creation time of the file get create times#Getmtime () Gets the modified time of the file get modify times#Getatime () Gets the access time of the file get active timesImportTimefilepath='/home/sy/Download/chls'result=os.path.getctime (filepath)Print(Time.ctime (result)) result=os.path.getmtime (filepath)Print(Time.ctime (result)) result=os.path.getatime (filepath)Print(Time.ctime (result))#exists () to detect if a path is actually presentfilepath ='/home/sy/Download/chls'result=os.path.exists (filepath)Print(Result)#Isabs () detects if a path is an absolute pathPath ='/boys'result=os.path.isabs (path)Print(Result)#Samefile () detects if 2 paths are the same filepath1 ='/home/sy/Download/001'path2='.. /.. /.. /Download/001'result=os.path.samefile (path1,path2)Print(Result)#Os.environ for getting and setting built-in values for system environment variablesImportOS#Get System environment variable getenv () effectPrint(os.environ['PATH'])#Set System environment variable putenv ()os.environ['PATH'] +=':/home/sy/Download'Os.system ('CHLs')

Python OS Module