This script mimics rsync which is available for the unix platform and have been ported to win32 one.
It is a sort of advanced version of xcopy.
Its aim is to selectively synchronize folders.
More precisely it copy selective parts of a folder to a destination folder and in addition can remove parts of the destination folder that do not correspond to parts of the original folder.
I like its capability to avoid copying files through the .cvsignore mechanism or the pattern matching mechanism and its capability to delete files that are no longer relevant,
not to mention that because it's a python script anyone can easily fix or improve it as he whish.
rsync implemented in Python