java如何将Stanford解析器输出为节点和边的列表?
我正在处理一批文本文件,我需要使用斯坦福解析器的输出作为节点和边的数字列表,节点有ID和标签,边由两个节点ID和一个边权重组成,比如:
Node List: 1 A , 2 B...
Edge list: 1 2 10, 2 1 10...
根据斯坦福大学NLP javadoc-->;类语义图:
There is no mechanism for returning all edges at once (eg edgeSet()). This is intentional. Use edgeIterable() to iterate over the edges if necessary.
怎么做?我尝试了以下代码:
import java.io.*;
import java.util.*;
import edu.stanford.nlp.io.*;
import edu.stanford.nlp.ling.*;
import edu.stanford.nlp.pipeline.*;
import edu.stanford.nlp.semgraph.SemanticGraph;
import edu.stanford.nlp.semgraph.SemanticGraphEdge;
import edu.stanford.nlp.trees.*;
import edu.stanford.nlp.util.*;
public class StanfordCoreNlpSemGraph {
public static void main(String[] args) throws IOException {
PrintWriter out;
if (args.length > 1) {
out = new PrintWriter(args[1]);
} else {
out = new PrintWriter(System.out);
}
PrintWriter xmlOut = null;
if (args.length > 2) {
xmlOut = new PrintWriter(args[2]);
}
StanfordCoreNLP pipeline = new StanfordCoreNLP();
Annotation annotation;
if (args.length > 0) {
annotation = new Annotation(IOUtils.slurpFileNoExceptions(args[0]));
} else {
annotation = new Annotation("This is the first annotation.");
}
pipeline.annotate(annotation);
pipeline.prettyPrint(annotation, out);
if (xmlOut != null) {
pipeline.xmlPrint(annotation, xmlOut);
}
// An Annotation is a Map.
// For instance, this gets the parse tree of the first sentence.
List<CoreMap> sentences = annotation.get(CoreAnnotations.SentencesAnnotation.class);
if (sentences != null && sentences.size() > 0) {
CoreMap sentence = sentences.get(0);
Tree tree = sentence.get(TreeCoreAnnotations.TreeAnnotation.class);
out.println();
out.println("The first sentence parsed is:");
tree.pennPrint(out);
Object IndexedWord;
SemanticGraph sg = new SemanticGraph();
SemanticGraphEdge edge = new SemanticGraphEdge(edge);
for (SemanticGraphEdge edge : sg.edgeIterable())
{
int headIndex = edge.getGovernor().index();
int depIndex = edge.getDependent().index();
int weight = 1; // "edge weight"-- should it be the
// sum of the weights of the
// selected edges?
System.out.printf("%d %d %d%n", headIndex, depIndex, weight);
}
}
}
}
但是它抛出了一个错误:Duplicate local variable edge StanfordCoreNlpSemGraph.java /stan-nlp/src line 60
# 1 楼答案
下面是一个形成边缘列表的基本示例。(节点列表部分应该很简单——你只需要迭代句子中的标记并打印出来。)