Python Os.path module Common methods __python

Import OS

Os.path.join (a,b,c) #abc为str
Stitching paths

>>> os.path.join (' d:\\ ', ' f ', ' study ')
' d:\\f\\study '
>>> os.path.join (' A ', ' B ', ' V ')
' A\\b\\v '

Os.path.abspath (a)
Returns the absolute path of a

>>> os.path.abspath (' news.txt ')
' c:\\python34\\news.txt '

Os.path.split (PATH)
Split addresses into directories and file names to return

>>> os.path.split (' C:\Python34\Lib\dbm\gnu.py ')
(' c:\\python34\\lib\\dbm ', ' gnu.py ')

Os.path.dirname (PATH)
Returns the absolute address of the directory where path is located

>>> os.path.dirname (' C:\Python34\Lib\dbm\gnu.py ')
' c:\\python34\\lib\\dbm '

Os.path.basename (PATH)
Returns the last element, the filename

>>> os.path.basename (' C:\Python34\Lib\cgi.py ')
' cgi.py '

Os.path.exists (PATH)
To determine if the path exists, to return true if it exists, false if it does not exist

>>> os.path.exists (' d:\\f\study ')
True

Os.path.isabs (PATH)
Determines whether an absolute path, the return value bool

Os.path.isfile (PATH)
True to determine if path is a file

Os.path.isdir (PATH)
Path is a directory that already exists, return true, or false

Os.path.normcase (PATH)
Converts uppercase in path to lowercase and single slash to double slash

Os.path.getsize (PATH)
Returns the file size (in bytes) of path

Os.path.getatime (PATH)
Returns the last access time for path "return as timestamp"

Os.path.getmtime (PATH)
Returns the last modified time of path, "return as timestamp"

Official documents: https://docs.python.org/3.4/library/os.path.html