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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 settings_module(self):
 """Gets SETTINGS_MODULE variable"""

        settings_module = parse_conf_data(
            os.environ.get(
                self.ENVVAR_FOR_DYNACONF, self.SETTINGS_FILE_FOR_DYNACONF
            ),
            tomlfy=True,
        )
        if settings_module != getattr(self, "SETTINGS_MODULE", None):
            self.set("SETTINGS_MODULE", settings_module)
        return self.SETTINGS_MODULE