open file in dir independently of operating system

[Joerg Schuster]

Hello,


I want to open the file 'configuration.smo' that is in directory dir.
Yet, I don't know on which os my program is being run. On Unix I would
say:

f = open(dir + '/configuration.smo', 'r')

What is the os-independent version of this line?

(I have read the manual of the module os, but I didn't see how to do
it.)


Jörg Schuster