本文整理汇总了Python中feature.Feature.tfidf方法的典型用法代码示例。如果您正苦于以下问题：Python Feature.tfidf方法的具体用法？Python Feature.tfidf怎么用？Python Feature.tfidf使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类feature.Feature的用法示例。
在下文中一共展示了Feature.tfidf方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: showResults
# 需要导入模块: from feature import Feature [as 别名]
# 或者: from feature.Feature import tfidf [as 别名]
def showResults(request):
global QUERY
global RET_ANS
query = request.GET['query']
query = query.encode('UTF-8')
if query == QUERY:
return JsonResponse(RET_ANS, safe=False)
else:
QUERY = query
#words = jieba.cut_for_search(query) #搜索分词
ch_q = jieba.cut(query) #精准模式的分词
kw_ch = [i for i in ch_q]
tag_obj = TagDict.objects.filter(tag_ch__in = kw_ch) #
cujiansuo = sum([tag.tag_class for tag in tag_obj], [])
kw_en = [tag.tag_en for tag in tag_obj] #存储关键词;
cujiansuo_res = sorted(set(cujiansuo), key=cujiansuo.index)
qa_obj = QuestionAnswer.objects.filter(id__in=cujiansuo_res)
print len(qa_obj)
kw_en_len = len(kw_en)
count_en = [0]*kw_en_len
res_list = [] #最终返回的列表;
kw = kw_en
for item in qa_obj:
q = item.question.lower()
a = item.answer.lower()
for i in range(kw_en_len):
k = kw_en[i]
if k in q or k in a:
count_en[i] += 1
if Is_rela(q, kw_en):
item_t = [item.id, item.question, ret_em(kw, item.answer), item.answer]
res_list.append(item_t)
D = len(res_list)
Idf = []
if not D == 0:
Idf = [abs(math.log(D/float(t+1))) for t in count_en]
theta1 = 1.0
theta2 = 1.0
theta3 = 1.0
mmax = 0.0
an_b = None
for item in res_list:
ans_sen = nltk.sent_tokenize(item[3])
en_a = sum([nltk.word_tokenize(t) for t in ans_sen],[])
en_q = nltk.word_tokenize(item[1])
socre_f = Feature(kw_ch, en_q, kw, en_a, Idf)
sorce = theta1 * socre_f.length_feature() + sum(map(lambda(x):x*theta2, socre_f.word_feature())) + sum(map(lambda(x):x*theta3, socre_f.tfidf()))
if mmax < sorce:
mmax = sorce
an_b = item
RET_ANS = res_list
write_file(res_list, query)
return JsonResponse(RET_ANS, safe=False)