def __init__(self, name, fid, field, value, message=""):
        TException.__init__(self, message)

        self.struct_name = name
        self.fid = fid
        self.field = field
        self.value = value

 def __init__(self, type=UNKNOWN, message=None):
   TException.__init__(self, message)
   self.type = type

 def __init__(self, identifier=None, key=None,):
   TException.__init__(self)
   self.identifier = identifier
   self.key = key