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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 objective_to_model(self, x_objective):
        ''' This function serves as interface between objective input vectors and
        model input vectors'''

        x_model = []

        for k in range(self.objective_dimensionality):
            variable = self.space_expanded[k]
            new_entry = variable.objective_to_model(x_objective[0,k])
            x_model += new_entry

        return x_model