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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 replace_constraint(self,name,**kwargs):
 """ Replaces removed constraint in each population. See :func:`vespa.stars.StarPopulation.replace_constraint` """


        for pop in self.poplist:
            pop.replace_constraint(name,**kwargs)
        if name not in self.constraints:
            self.constraints.append(name)