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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_path(self, prefix=None, filename=None):
 """Compose data location path."""

        prefix = prefix or settings.FLOW_EXECUTOR['DATA_DIR']

        path = os.path.join(prefix, self.subpath)
        if filename:
            path = os.path.join(path, filename)

        return path