def label_predication(node, inherit_tag=False):
kid_tag = strip_tag_if(not inherit_tag, node.tag)
kids = map(label_node, node.kids)
last_kid, second_last_kid = twice(get_kid_)(kids)
cur = Node(kid_tag, [second_last_kid, last_kid], head_index=1)
while kids:
kid = get_kid_(kids)
cur = Node(kid_tag, [kid, cur], head_index=1)
cur.tag = node.tag # restore the full tag at the topmost level
return cur
def label_head_initial(node, inherit_tag=False):
if has_tag(node, 'c'): inherit_tag=False
kid_tag = strip_tag_if(not inherit_tag, node.tag)
kids = map(label_node, node.kids)[::-1]
first_kid, second_kid = twice(kids.pop)()
cur = Node(kid_tag, [first_kid, second_kid], head_index=0)
while kids:
kid = kids.pop()
cur = Node(kid_tag, [cur, kid], head_index=0)
cur.tag = node.tag
return cur