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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 matrix(self):
 """Build matrix representation of Householder transformation. Builds the matrix representation :math:`H = I - \\beta vv^*`. **Use with care!** This routine may be helpful for testing purposes but should not be used in production codes for high dimensions since the resulting matrix is dense. """

        n = self.v.shape[0]
        return numpy.eye(n, n) - self.beta * numpy.dot(self.v, self.v.T.conj())