def __init__(self, ba, nla_len=None, nla_type=None):
super(nlattr, self).__init__(ba)<EOL>if nla_len is not None:<EOL><INDENT>self.nla_len = nla_len<EOL><DEDENT>if nla_type is not None:<EOL><INDENT>self.nla_type = nla_type<EOL><DEDENT>
Constructor.