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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 ifaces(cls, name):
 """ Get vlan attached ifaces. """

        ifaces = Iface.list({'vlan_id': cls.usable_id(name)})
        ret = []
        for iface in ifaces:
            ret.append(Iface.info(iface['id']))
        return ret