[python] How to use "/" (directory separator) in both Linux and Windows in Python?

I have written a code in python which uses / to make a particular file in a folder, if I want to use the code in windows it will not work, is there a way by which I can use the code in Windows and Linux.

In python I am using this code:

pathfile=os.path.dirname(templateFile)
rootTree.write(''+pathfile+'/output/log.txt')

When I will use my code in suppose windows machine my code will not work.

How do I use "/" (directory separator) in both Linux and Windows?

You can use os.sep:

>>> import os
>>> os.sep
'/'

Do a import os and then use os.sep

Use:

import os
print os.sep

to see how separator looks on a current OS.
In your code you can use:

import os
path = os.path.join('folder_name', 'file_name')

Don't build directory and file names your self, use python's included libraries.

In this case the relevant one is os.path. Especially join which creates a new pathname from a directory and a file name or directory and split that gets the filename from a full path.

Your example would be

pathfile=os.path.dirname(templateFile)
p = os.path.join(pathfile, 'output')
p = os.path.join( p, 'log.txt')
rootTree.write(p)

If you are fortunate enough to be running Python 3.4+, you can use pathlib:

from pathlib import Path

path = Path(dir, subdir, filename)  # returns a path of the system's path flavour

or, equivalently,

path = Path(dir) / subdir / filename

Some useful links that will help you:

• os.sep
• os.path
• os.pathsep

You can use "os.sep "

 import os
 pathfile=os.path.dirname(templateFile)
 directory = str(pathfile)+os.sep+'output'+os.sep+'log.txt'
 rootTree.write(directory)

os.path.normpath(pathname) should also be mentioned as it converts / path separators into \ separators on Windows. It also collapses redundant uplevel references... i.e., A/B and A/foo/../B and A/./B all become A/B. And if you are Windows, these all become A\B.