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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 relative_path(self, absolute_path, output_filename):
 """Rewrite paths relative to the output stylesheet path"""

        absolute_path = posixpath.join(settings.PIPELINE_ROOT, absolute_path)
        output_path = posixpath.join(settings.PIPELINE_ROOT, posixpath.dirname(output_filename))
        return relpath(absolute_path, output_path)