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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_stddevs(self, coeffs, stddev_types, num_sites):
 """ Return total sigma as reported in Table 2, p. 1202. """

        stddevs = []
        for stddev_type in stddev_types:
            assert stddev_type in self.DEFINED_FOR_STANDARD_DEVIATION_TYPES
            stddevs.append(coeffs['sigma'] + np.zeros(num_sites))
        return np.array(stddevs)