Usage of os.path method of the os module. From http://www.diveintopython3.net/comprehensions.html

OSPath.py

>>> import os
>>> print(os.path.join('/Users/pilgrim/diveintopython3/examples/', 'humansize.py'))              
/Users/pilgrim/diveintopython3/examples/humansize.py
>>> print(os.path.join('/Users/pilgrim/diveintopython3/examples', 'humansize.py'))               
/Users/pilgrim/diveintopython3/examples\humansize.py
>>> print(os.path.expanduser('~'))                                                               
c:\Users\pilgrim
>>> print(os.path.join(os.path.expanduser('~'), 'diveintopython3', 'examples', 'humansize.py'))  
c:\Users\pilgrim\diveintopython3\examples\humansize.py


>>> os.getcwd()                        
/home/you
>>> os.path.abspath('')                
/home/you
>>> os.path.abspath('.ssh')            
/home/you/.ssh


>>> pathname = '/Users/pilgrim/diveintopython3/examples/humansize.py'
>>> os.path.split(pathname)                                        
('/Users/pilgrim/diveintopython3/examples', 'humansize.py')
>>> (dirname, filename) = os.path.split(pathname)                  
>>> dirname                                                        
'/Users/pilgrim/diveintopython3/examples'
>>> filename                                                       
'humansize.py'
>>> (shortname, extension) = os.path.splitext(filename)            
>>> shortname
'humansize'
>>> extension
'.py'

>>> os.chdir('/Users/pilgrim/diveintopython3/')
>>> import glob
>>> glob.glob('examples/*.xml')                  ①
['examples\\feed-broken.xml',
 'examples\\feed-ns0.xml',
 'examples\\feed.xml']