def __init__(self, family=None, list_=None, name='', id_=0):
        """Constructor."""
        self.family = family
        self.list_ = list_ or nl_list_head(container_of=self)
        self.name = name
        self.id_ = id_
def __init__ ( self , family = None , list_ = None , name = '' , id_ = 0 ) : self . family = family self . list_ = list_ or nl_list_head ( container_of = self ) self . name = name self . id_ = id_
Constructor.