【自然语言处理】中文语义消歧实验代码
本实验以句子为单位进行语义消歧,即输入一句话,识别该句子中某个歧义词的含义。
本次实验使用的算法比较简单,是以TF_IDF为权重的频数判别
代码如下:
import os
import jieba
from math import log2
# 读取每个义项的语料
def read_file(path):
with open(path, 'r', encoding='utf-8') as f:
lines = [_.strip() for _ in f.readlines()]
return lines
# 对示例句子分词
# sent = '赛季初的时候,火箭是众望所归的西部决赛球队。'
'''
***写入代码***填入对应代码确定要消歧的句子和对应的词
'''
# 去掉停用词
stopwords = ['我', '你', '它', '他', '她', '了', '是', '的', '啊', '谁', '什么','都',\
'很', '个', '之', '人', '在', '上', '下', '左', '右', '。', ',', '!', '?']
'''
***写入代码***使用遍历的方式得到去掉停用词后的sent_cut
'''
# 计算其他词的TF-IDF以及频数
wsd_dict = {}
for file in os.listdir('.'):
if wsd_word in file:
wsd_dict[file.replace('.txt', '')] = read_file(file)
# 统计每个词语在语料中出现的次数
tf_dict = {}
for meaning, sents in wsd_dict.items():
tf_dict[meaning] = []
for word in sent_cut:
word_count = 0
for sent in sents:
example = list(jieba.cut(sent, cut_all=False))
word_count += example.count(word)
if word_count:
tf_dict[meaning].append((word, word_count))
idf_dict = {}
for word in sent_cut:
document_count = 0
for meaning, sents in wsd_dict.items():
for sent in sents:
if word in sent:
document_count += 1
idf_dict[word] = document_count
# 输出值
total_document = 0
for meaning, sents in wsd_dict.items():
total_document += len(sents)
# 计算tf_idf值
mean_tf_idf = []
for k, v in tf_dict.items():
print(k+':')
tf_idf_sum = 0
for item in v:
word = item[0]
tf = item[1]
tf_idf = item[1]*log2(total_document/(1+idf_dict[word]))
tf_idf_sum += tf_idf
print('%s, 频数为: %s, TF-IDF值为: %s'% (word, tf, tf_idf))
mean_tf_idf.append((k, tf_idf_sum))
sort_array = sorted(mean_tf_idf, key=lambda x:x[1], reverse=True)
true_meaning = sort_array[0][0].split('_')[1]
print('\n经过词义消岐,%s在该句子中的意思为 %s .' % (wsd_word, true_meaning))
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作者:萌狼蓝天
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