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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 add_reaction_constraints(model, reactions, Constraint):
 """ Add the stoichiometric coefficients as constraints. Parameters model : optlang.Model The transposed stoichiometric matrix representation. reactions : iterable Container of `cobra.Reaction` instances. Constraint : optlang.Constraint The constraint class for the specific interface. """

    constraints = []
    for rxn in reactions:
        expression = add(
            [c * model.variables[m.id] for m, c in rxn.metabolites.items()])
        constraints.append(Constraint(expression, lb=0, ub=0, name=rxn.id))
    model.add(constraints)