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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_rsr_data_version(self):
 """Check the version of the RSR data from the version file in the RSR directory """


        rsr_data_version_path = os.path.join(self.rsr_dir, RSR_DATA_VERSION_FILENAME)
        if not os.path.exists(rsr_data_version_path):
            return "v0.0.0"

        with open(rsr_data_version_path, 'r') as fpt:
            # Get the version from the file
            return fpt.readline().strip()