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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 log_weights(self):
 """Log weights as described in the FS framework."""

        m = self.kernel.feature_log_prob_[self._match_class_pos()]
        u = self.kernel.feature_log_prob_[self._nonmatch_class_pos()]

        return self._prob_inverse_transform(m - u)