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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_relative_path(self, root):
 """ Gets the fragment of the current path starting at root. """

        if self.path == root:
            return ''
        ancestors = self.ancestors(stop=root)
        return functools.reduce(lambda f, p: Folder(p.name).child(f),
                                ancestors,
                                self.name)