Python: File Operations Summary 2--module operation

One, the OS module commonly used file processing function

The OS module provides an excuse function for the system environment, files, directories, and other operating system levels.

1.os.access (Path,mode): Determine if the file under Path has permission mode, or return FALSE if it returns true

[Parameter description]:

Access path to the path--file

mode--Permissions

Parameter values for mode	Describe
Os. F_ok	Test if the file under path exists
Os. R_ok	Test if the file under path is readable
Os. W_ok	Test if the file under path is writable
Os. X_ok	Test if the file under path is executable

1 ImportOS2 #assume that the Example.txt file exists and has read and write permissions3 Print(Os.access (R'D:\example.txt', OS. F_OK)) #判断文件example. txt is present 4 Print(Os.access (R'D:\example.txt', OS. R_OK)) #判断文件example. txt has read access 5 Print(Os.access (R'D:\example.txt', OS. W_OK)) #判断文件exampl. Txxt If write access is available 6 Print(Os.access (R'D:\example.txt', OS. X_OK)) #判断文件example. txt is executable 7 #assuming that the Tom.txt file does not exist8 Print(Os.access (R'D:\tom.txt', OS. F_OK))9 Print(Os.access (R'D:\tom.txt', OS. X_OK))

2.os.chdir (path): changes the current working directory to the specified path

[Parameter Description]:path--the new path to switch to

[Return value]: False if change is allowed to return true

1 ImportOS2 #view current working directory3Cwd=OS.GETCWD ()4 Print('the current working path is:', CWD)5 #Modify working Directory6Os.chdir (R'D:\workspace')7 #View the modified working directory8Cwd=OS.GETCWD ()9 Print('the modified working path is:', CWD)

Python: File Operations Summary 2--module operation