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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 derivative(self, x):
 """Derivative of the broadcast operator. Parameters x : `domain` element The point to take the derivative in Returns ------- adjoint : linear `BroadcastOperator` The derivative Examples -------- Example with an affine operator: Calling operator offsets by ``[1, 1, 1]``: ProductSpace(rn(3), 2).element([ [ 0., 1., 2.], [ 0., 2., 4.] ]) The derivative of this affine operator does not have an offset: ProductSpace(rn(3), 2).element([ [ 1., 2., 3.], [ 2., 4., 6.] ]) """

        return BroadcastOperator(*[op.derivative(x) for op in
                                   self.operators])