Python Full Stack development "supplement" review some common operations of OS module

Import os# 1. Switch path =============d = OS.GETCWD () #获取当前的工作路径os. ChDir (' d:\\ ') #目录的切换print (OS.GETCWD ()) # (Toggle the past how to come back?) I'll be back in a chdir. Os.chdir (d) Print (OS.GETCWD ()) # 2. Execute the System commands =============# system and Popen are all execution systems commands, but popen is more useful, Because it has a return value of Os.system (' dir ') #显示的是gbk的编码, # solves the system garbled method ret = Os.popen (' dir ') #popen是有返回值的, and self-transcoded print (Ret.read ()) # 3. Create folder = and create file ==========os.mkdir (' temp ') #生成一个文件夹, you can only generate one Os.mkdir (R ' Temp2\inner ') #这样就报错了os. Makedirs (R ' Temp1\inner ' , Exist_ok=true) #创建多级目录os. Makedirs (R ' Temp1\inner\inner2 ', exist_ok=true) #创建多级目录 # So if the folder already exists, then the error, if I do not want to make an error ( If there is, do not create or error), then add exist_ok=true# create file F = open (R ' Temp1\inner\file ', ' W ') F.close () # 4.====== Rename folder =====os.rename ( R ' Temp1\inner\inner2 ', ' Temp1\inner\haiyan ') # 5.===== Delete the folder and delete the file =========# first deleting the file, Os.remove (R ' Temp1\inner\file ') # Then delete the folder Os.removedirs (R ' Temp1\inner\haiyan ') #删除一个文件夹的时候, if the previous level of the folder is empty, it is deleted. And so on Os.rmdir ((R ' Temp1\inner ')) #只删除一个文件夹 # 6. Subdirectory ========print (Os.listdir (OS.GETCWD ())) #打印当前目录下的目录print (Os.walk ( OS.GETCWD ()) #<generator Object waLK at 0x00000000021c6728>ret = Os.walk (OS.GETCWD ()) #拿到的东西比较多, if you care about something under a subdirectory, use Walkprint (list (ret)) # 7.==== Structure description for obtaining information about a file or directory ========print (os.stat (' temp ') # st_atime: Last Accessed Time # St_mtime: Last Modified Time # st_ctime: Latest update time print ( OS.SEP) # Prints print (OS.GETCWD ()) File_path = '%s%s%s '% (OS.GETCWD (), os.sep, ' filename ') #拼接一个路径 (mode one) print (File_path) Print (Os.path.join (OS.GETCWD (), ' filename ')) #拼接一个路径 (mode two) # 8.==== string indicates the current use of platform print (os.name) #如果是win, then the printed NT if yes, Linux, Print poxis# application scenario: When you enter a command, you have to decide whether it is a win or a Linux system. You can use # Os.name to judge the # 9.=== get the System environment variable =====print (os.environ) # 10. Path-related =======print (Os.path.abspath (' namedtuple.py ')) Print (Os.path.dirname (Os.path.abspath (' namedtuple.py '))) print (Os.path.dirname (Os.path.dirname (Os.path.abspath ( ' namedtuple.py '))) print (Os.path.exists (Os.path.abspath (' namedtuple.py ')))

　　

Python Full Stack development "supplement" review some common operations of OS module