tree_utils.py 文件源码

def to_nltk_tree_general(node, attr_list=("dep_", "pos_"), level=99999):
    """Tranforms a Spacy dependency tree into an NLTK tree, with certain spacy tree node attributes serving
    as parts of the NLTK tree node label content for uniqueness.

    Args:
        node: The starting node from the tree in which the transformation will occur.
        attr_list: Which attributes from the Spacy nodes will be included in the NLTK node label.
        level: The maximum depth of the tree.

    Returns:
        A NLTK Tree (nltk.tree)
    """

    # transforms attributes in a node representation
    value_list = [getattr(node, attr) for attr in attr_list]
    node_representation = "/".join(value_list)

    if level == 0:
        return node_representation

    if node.n_lefts + node.n_rights > 0:
        return Tree(node_representation, [to_nltk_tree_general(child, attr_list, level-1) for child in node.children])
    else:
        return node_representation