tree.py 文件源码

python
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项目:ReGraph 作者: eugeniashurko 项目源码 文件源码
def new_rule(hie, parent, name, pattern_name=None):
    """create a new rule """
    if valid_child_name(hie, parent, name):
        if pattern_name is None:
            pattern = nx.DiGraph()
        else:
            pattern_id = child_from_name(hie, parent, pattern_name)
            pattern = hie.node[pattern_id].graph
        rule_id = hie.unique_graph_id(name)
        rule = Rule(pattern, pattern, pattern)
        hie.add_rule(rule_id, rule, {"name": name})
        if parent is not None:
            if pattern_name is None:
                hie.add_rule_typing(rule_id, parent, {}, {})
            else:
                mapping = hie.edge[pattern_id][parent].mapping
                hie.add_rule_typing(rule_id, parent, mapping, mapping)
    else:
        raise ValueError("Invalid new name")


# TODO : undirected ?
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