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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 load_settings(self):
 """Load settings module from the model_dir directory."""

        mname = 'loaded_module'
        if six.PY2:
            import imp
            return imp.load_source(mname, self.settings_filename)
        else:
            import importlib.machinery
            loader = importlib.machinery.SourceFileLoader(mname, self.settings_filename)
        return loader.load_module(mname)