def step4_cal():
""" 24 点时merge已有的簇
"""
if not initializing and now_hour == 0:
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' %s start step4' % ts2datetime(timestamp)
subevents = event.getSubEvents()
subevent_fwords = dict()
for subevent in subevents:
subeventid = subevent["_id"]
feature = Feature(subeventid)
# 获取每个子事件最新的特征词
fwords = feature.get_newest()
subevent_fwords[subeventid] = fwords
subeventids_sort_timestamp = event.get_sorted_subeventids()
cids, mids = merge_subevents(subevent_fwords, subeventids_sort_timestamp, top_tfidf_para=10, top_percent=0.3)
for res_id, mer_id in mids:
# 将mer_id下的文本扔入res_id下的簇，remove mer_id的簇
temp_infos = event.get_subevent_infos(mer_id)
for r in temp_infos:
news = News(r["_id"], event.id)
news.update_news_subeventid(res_id)
event.remove_subevents([mer_id])
# 重新计算各簇的特征词, 并计算文本权重, 并去重
if len(mids):
step3_cal()
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' %s end step3' % ts2datetime(timestamp)
def step1_cal():
"""第一步计算，获取子事件特征词，新文本与特征词匹配分类
"""
print '[%s] ' % ts2datetime(int(time.time(
))), 'event ', eventid, ' %s start step1' % ts2datetime(timestamp)
if initializing:
# 若话题需要做初始聚类，获取话题开始时间之前的文本
results = event.getInitialInfos()
else:
# 若话题已做完初始聚类，获取话题最新一小时的文本
results = event.getInfos(timestamp - 3600, timestamp)
if now_hour == 0:
# 如果不是在做初始化，24时的时候, 一定把当天（大于或等于0时小于24时）产生的簇（非其他簇）下的文本重新做一下匹配, 同时删除这些簇
temp_subeventids = event.getTodayCreatSubeventIds()
temp_infos = event.getTodayCreatSubeventInfos()
event.remove_subevents(temp_subeventids)
results.extend(temp_infos)
print eventid, ' before classify: ', len(results)
# 获取子事件
subevents = event.getSubEvents()
labels_list = []
feature_words_list = []
for subevent in subevents:
subeventid = subevent["_id"]
feature = Feature(subeventid)
# 获取每个子事件最新的特征词
fwords = feature.get_newest()
feature_words_list.append(fwords)
labels_list.append(subeventid)
for r in results:
text = (r['title'] + r['content168']).encode('utf-8')
feature_words_inputs = []
for fwords in feature_words_list:
wcdict = dict()
for w, c in fwords.iteritems():
if isinstance(w, unicode):
w = w.encode('utf-8')
wcdict[w] = c
feature_words_inputs.append(wcdict)
# 单条文本与各子事件的特征词进行匹配，得到每条文本的簇标签
label = subevent_classifier(text, labels_list,
feature_words_inputs)
if label == "other":
label = event.getOtherSubEventID()
news = News(r["_id"], event.id)
news.update_news_subeventid(label)
print '[%s] ' % ts2datetime(int(time.time(
))), 'event ', eventid, ' %s end step1' % ts2datetime(timestamp)
def step1_cal():
"""第一步计算，获取子事件特征词，新文本与特征词匹配分类
"""
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' %s start step1' % ts2datetime(timestamp)
if initializing:
# 若话题需要做初始聚类，获取话题开始时间之前的文本
results = event.getInitialInfos()
else:
# 若话题已做完初始聚类，获取话题最新一小时的文本
results = event.getInfos(timestamp - 3600, timestamp)
if now_hour == 0:
# 如果不是在做初始化，24时的时候, 一定把当天（大于或等于0时小于24时）产生的簇（非其他簇）下的文本重新做一下匹配, 同时删除这些簇
temp_subeventids = event.getTodayCreatSubeventIds()
temp_infos = event.getTodayCreatSubeventInfos()
event.remove_subevents(temp_subeventids)
results.extend(temp_infos)
print eventid, ' before classify: ', len(results)
# 获取子事件
subevents = event.getSubEvents()
labels_list = []
feature_words_list = []
for subevent in subevents:
subeventid = subevent["_id"]
feature = Feature(subeventid)
# 获取每个子事件最新的特征词
fwords = feature.get_newest()
feature_words_list.append(fwords)
labels_list.append(subeventid)
for r in results:
text = (r['title'] + r['content168']).encode('utf-8')
feature_words_inputs = []
for fwords in feature_words_list:
wcdict = dict()
for w, c in fwords.iteritems():
if isinstance(w, unicode):
w = w.encode('utf-8')
wcdict[w] = c
feature_words_inputs.append(wcdict)
# 单条文本与各子事件的特征词进行匹配，得到每条文本的簇标签
label = subevent_classifier(text, labels_list, feature_words_inputs)
if label == "other":
label = event.getOtherSubEventID()
news = News(r["_id"], event.id)
news.update_news_subeventid(label)
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' %s end step1' % ts2datetime(timestamp)
def step2_cal():
"""第二步计算，判断其他类是否需要分裂，若需要，则对其他类进行文本聚类，并做聚类评价
"""
# 聚类评价时选取TOPK_FREQ_WORD的高频词
TOPK_FREQ_WORD = 50
# 聚类评价时最小簇的大小
LEAST_SIZE = 8
# 判断其他类是否需要分裂
ifsplit = event.check_ifsplit(initializing)
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' split ', ifsplit, ' %s start step2' % ts2datetime(timestamp)
if ifsplit:
inputs, kmeans_cluster_num, reserve_num = event.getOtherSubEventInfos(initializing)
print eventid, ' after classify before split: ', len(inputs), kmeans_cluster_num, reserve_num
if len(inputs) > 2:
items = []
for r in inputs:
r["title"] = r["title"].encode("utf-8")
r["content"] = r["content168"].encode("utf-8")
items.append(r)
# kmeans聚类
kmeans_results = kmeans(items, k=kmeans_cluster_num)
# 聚类评价
if initializing or now_hour == 0:
min_tfidf = event.get_min_tfidf()
final_cluster_results, tfidf_dict = cluster_evaluation(kmeans_results, top_num=reserve_num, topk_freq=TOPK_FREQ_WORD, least_size=LEAST_SIZE, min_tfidf=min_tfidf)
else:
# 每小时聚类时，不用和已有簇的最小tfidf作比
final_cluster_results, tfidf_dict = cluster_evaluation(kmeans_results, top_num=reserve_num, topk_freq=TOPK_FREQ_WORD, least_size=LEAST_SIZE)
# 更新新闻簇标签，更新子事件表
for label, items in final_cluster_results.iteritems():
if label == "other":
label = event.getOtherSubEventID()
event.save_subevent(label, timestamp)
if label != event.getOtherSubEventID():
# 更新每类的tfidf
event.update_subevent_tfidf(label, tfidf_dict[label])
for r in items:
news = News(r["_id"], event.id)
news.update_news_subeventid(label)
else:
print 'inputs less than 2, kmeans aborted'
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' %s end step2' % ts2datetime(timestamp)
def text_kmeans_clustering():
# 聚类评价时选取TOPK_FREQ_WORD的高频词
TOPK_FREQ_WORD = 50
# 聚类评价时最小簇的大小
LEAST_SIZE = 8
eventcomment = EventComments(topicid)
newsIds = eventcomment.getNewsIds()
for news_id in newsIds:
results = eventcomment.getNewsComments(news_id)
inputs = []
for r in results:
r['title'] = ''
r['content'] = r['content168'].encode('utf-8')
r['text'] = r['content168']
item = ad_filter(r)
if item['ad_label'] == 0:
inputs.append(item)
# 情绪计算
for r in inputs:
sentiment = triple_classifier(r)
comment = Comment(r['_id'])
comment.update_comment_sentiment(sentiment)
# kmeans 聚类及评价
kmeans_results = kmeans(inputs, k=10)
reserve_num = 5
final_cluster_results, tfidf_dict = cluster_evaluation(kmeans_results, \
top_num=reserve_num, topk_freq=TOPK_FREQ_WORD, least_size=LEAST_SIZE, min_tfidf=None)
inputs = []
for label, items in final_cluster_results.iteritems():
if label != 'other':
inputs.extend(items)
for item in items:
news = News(item['news_id'])
if label == 'other':
label = news.otherClusterId
comment = Comment(item['_id'])
comment.update_comment_label(label)
eventcomment.save_cluster(label, news_id, int(time.time()))
#计算各簇特征词
cluster_feature = extract_feature(inputs)
for label, fwords in cluster_feature.iteritems():
eventcomment.update_feature_words(label, fwords)
#计算文本权重
for input in inputs:
weight = text_weight_cal(input, cluster_feature[input['label']])
comment = Comment(input['_id'])
comment.update_comment_weight(weight)
def step3_cal():
"""计算各簇的特征词、代表文本、去重, 更新簇的大小、增幅信息
"""
print '[%s] ' % ts2datetime(int(time.time(
))), 'event ', eventid, ' %s start step3' % ts2datetime(timestamp)
inputs = []
subevents = event.getSubEvents()
for subevent in subevents:
subeventid = subevent["_id"]
inputs.extend(event.getSubeventInfos(subeventid))
for r in inputs:
r["title"] = r["title"].encode("utf-8")
r["content"] = r["content168"].encode("utf-8")
r["label"] = r["subeventid"]
# 计算各簇的存量特征词
cluster_feature = extract_feature(inputs)
for label, fwords in cluster_feature.iteritems():
feature = Feature(label)
feature.upsert_newest(fwords)
# 计算文本权重
for r in inputs:
weight = text_weight_cal(r, cluster_feature[r['label']])
news = News(r["_id"], event.id)
news.update_news_weight(weight)
# 文本去重
items_dict = {}
for r in inputs:
try:
items_dict[r["label"]].append(r)
except KeyError:
items_dict[r["label"]] = [r]
for label, items in items_dict.iteritems():
results = duplicate(items)
for r in results:
news = News(r["_id"], event.id)
news.update_news_duplicate(r["duplicate"], r["same_from"])
# 更新簇的大小、增幅信息
before_size = event.get_subevent_size(label)
event.update_subevent_size(label, len(items))
event.update_subevent_addsize(label, len(items) - before_size)
if initializing:
# 更新事件状态由initializing变为active
event.activate()
print '[%s] ' % ts2datetime(int(time.time(
))), 'event ', eventid, ' %s end step3' % ts2datetime(timestamp)
def step4_cal():
""" 24 点时merge已有的簇
"""
if not initializing and now_hour == 0:
print '[%s] ' % ts2datetime(int(time.time(
))), 'event ', eventid, ' %s start step4' % ts2datetime(timestamp)
subevents = event.getSubEvents()
subevent_fwords = dict()
for subevent in subevents:
subeventid = subevent["_id"]
feature = Feature(subeventid)
# 获取每个子事件最新的特征词
fwords = feature.get_newest()
subevent_fwords[subeventid] = fwords
subeventids_sort_timestamp = event.get_sorted_subeventids()
cids, mids = merge_subevents(subevent_fwords,
subeventids_sort_timestamp,
top_tfidf_para=10,
top_percent=0.3)
for res_id, mer_id in mids:
# 将mer_id下的文本扔入res_id下的簇，remove mer_id的簇
temp_infos = event.get_subevent_infos(mer_id)
for r in temp_infos:
news = News(r["_id"], event.id)
news.update_news_subeventid(res_id)
event.remove_subevents([mer_id])
# 重新计算各簇的特征词, 并计算文本权重, 并去重
if len(mids):
step3_cal()
print '[%s] ' % ts2datetime(int(time.time(
))), 'event ', eventid, ' %s end step3' % ts2datetime(timestamp)
def test_subevent_classifier():
labels_list = []
feature_words_inputs = []
subevents = event.getSubEvents()
for subevent in subevents:
subeventid = subevent["_id"]
if subeventid != "575612b6-a26f-4df9-a2de-01c85cae56a2":
labels_list.append(subeventid)
feature = Feature(subeventid)
feature_words = feature.get_newest()
new_feature_words = dict()
for k, v in feature_words.iteritems():
new_feature_words[k.encode('utf-8')] = v
feature_words_inputs.append(new_feature_words)
news_id = "http://news.xinhuanet.com/comments/2014-11/03/c_1113084515.htm"
news = News(news_id, event.id)
ns = news.get_news_info()
text = ns['title'].encode('utf-8') + ns['content168'].encode('utf-8')
label = subevent_classifier(text, labels_list, feature_words_inputs)
print label
def add(self, id):
parser = NewsParser(id)
if not parser.success:
return False
try:
date = parser.get_date()
header = parser.get_header()
text = parser.get_text()
except Exception:
return False
news_entry = News(id=id, date=date, header=header, text=text)
self.session.add(news_entry)
self.session.commit()
return True
def step3_cal():
"""计算各簇的特征词、代表文本、去重, 更新簇的大小、增幅信息
"""
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' %s start step3' % ts2datetime(timestamp)
inputs = []
subevents = event.getSubEvents()
for subevent in subevents:
subeventid = subevent["_id"]
inputs.extend(event.getSubeventInfos(subeventid))
for r in inputs:
r["title"] = r["title"].encode("utf-8")
r["content"] = r["content168"].encode("utf-8")
r["label"] = r["subeventid"]
# 计算各簇的存量特征词
cluster_feature = extract_feature(inputs)
for label, fwords in cluster_feature.iteritems():
feature = Feature(label)
feature.upsert_newest(fwords)
# 计算文本权重
for r in inputs:
weight = text_weight_cal(r, cluster_feature[r['label']])
news = News(r["_id"], event.id)
news.update_news_weight(weight)
# 文本去重
items_dict = {}
for r in inputs:
try:
items_dict[r["label"]].append(r)
except KeyError:
items_dict[r["label"]] = [r]
for label, items in items_dict.iteritems():
results = duplicate(items)
for r in results:
news = News(r["_id"], event.id)
news.update_news_duplicate(r["duplicate"], r["same_from"])
# 更新簇的大小、增幅信息
before_size = event.get_subevent_size(label)
event.update_subevent_size(label, len(items))
event.update_subevent_addsize(label, len(items) - before_size)
if initializing:
# 更新事件状态由initializing变为active
event.activate()
print '[%s] ' % ts2datetime(int(time.time())), 'event ', eventid, ' %s end step3' % ts2datetime(timestamp)
def one_topic_calculation_comments_v2(topicid):
"""对评论进行聚类
"""
from comment_clustering_tfidf_v2 import kmeans, tfidf_v2, text_classify, cluster_evaluation, global_text_weight
eventcomment = EventComments(topicid)
newsIds = eventcomment.getNewsIds()
for news_id in newsIds:
eventcomment.clear_cluster(news_id)
results = eventcomment.getNewsComments(news_id)
news = News(news_id)
inputs = []
for r in results:
r['title'] = ''
r['content'] = r['content168'].encode('utf-8')
r['text'] = r['content168']
item = ad_filter(r)
if item['ad_label'] == 0:
inputs.append(item)
# 情绪计算
for r in inputs:
sentiment = triple_classifier(r)
comment = Comment(r['_id'], topicid)
comment.update_comment_sentiment(sentiment)
tfidf_word = tfidf_v2(inputs)
#聚类个数=过滤后文本数/2向上取整，大于10的取10
kmeans_cluster_number = int(math.ceil(float(len(inputs)) / 5.0))
if kmeans_cluster_number > 10:
kmeans_cluster_number = 10
if kmeans_cluster_number < 5:
kmeans_cluster_number = 5
# 评论词聚类
word_label = kmeans(tfidf_word, inputs, k=kmeans_cluster_number)
# 计算全局文本权重
for r in inputs:
gweight = global_text_weight(r['content'], tfidf_word)
comment = Comment(r['_id'], topicid)
comment.update_comment_global_weight(gweight)
# 评论文本分类
results = text_classify(inputs, word_label, tfidf_word)
#簇评价
reserved_num = int(math.ceil(float(kmeans_cluster_number) / 2.0))
LEAST_CLUSTER_SIZE = 3 # 最小的簇大小
TOPK_FREQ = 10
TOPK_WEIGHT = 5
LEAST_FREQ = 0
final_cluster_results = cluster_evaluation(results, top_num=reserved_num, topk_freq=TOPK_FREQ, \
least_freq=LEAST_FREQ, least_size=LEAST_CLUSTER_SIZE, topk_weight=TOPK_WEIGHT)
for label, items in final_cluster_results.iteritems():
if label == 'other':
label = news.otherClusterId
if len(items):
eventcomment.save_cluster(label, news_id, int(time.time()))
if label != news.otherClusterId:
fwords = word_label[label]
eventcomment.update_feature_words(label, fwords)
for item in items:
comment = Comment(item['_id'], topicid)
comment.update_comment_label(label)
comment.update_comment_weight(item['weight'])
def one_topic_calculation_comments_v7(topicid):
"""对评论进行聚类
"""
from comment_clustering_tfidf_v7 import tfidf_v2, text_classify, \
cluster_evaluation, choose_cluster
from weibo_subob_rub_neu_classifier import weibo_subob_rub_neu_classifier
eventcomment = EventComments(topicid)
newsIds = eventcomment.getNewsIds()
for news_id in newsIds:
eventcomment.clear_cluster(news_id)
results = eventcomment.getNewsComments(news_id)
news = News(news_id)
# 数据字段预处理
inputs = []
for r in results:
r['title'] = ''
r['content168'] = r['content168'].encode('utf-8')
r['content'] = r['content168']
r['text'] = r['content168']
item = ad_filter(r)
if item['ad_label'] == 0:
inputs.append(item)
# 去除垃圾和新闻文本
items = weibo_subob_rub_neu_classifier(inputs)
inputs = []
for item in items:
subob_rub_neu_label = item['subob_rub_neu_label']
if not subob_rub_neu_label in [1, 0]:
# 1表示垃圾文本，0表示新闻文本
inputs.append(item)
MIN_CLUSTERING_INPUT = 30
MIN_CLUSTER_NUM = 2
MAX_CLUSTER_NUM = 10
# TFIDF词、聚类数量自动选择、vsm作属性也要可设成参数
if len(inputs) >= MIN_CLUSTERING_INPUT:
tfidf_word, input_dict = tfidf_v2(inputs)
results = choose_cluster(tfidf_word, inputs, MIN_CLUSTER_NUM,
MAX_CLUSTER_NUM)
#评论文本聚类
cluster_text = text_classify(inputs, results, tfidf_word)
evaluation_inputs = []
for k, v in enumerate(cluster_text):
inputs[k]['label'] = v['label']
inputs[k]['weight'] = v['weight']
evaluation_inputs.append(inputs[k])
#簇评价
recommend_text = cluster_evaluation(evaluation_inputs)
for label, items in recommend_text.iteritems():
if label == 'other':
label = news.otherClusterId
if len(items):
eventcomment.save_cluster(label, news_id, int(time.time()))
if label != news.otherClusterId:
fwords = results[label]
eventcomment.update_feature_words(label, fwords)
for item in items:
comment = Comment(item['_id'], topicid)
comment.update_comment_label(label)
comment.update_comment_weight(item['weight'])
# 情绪计算
for r in inputs:
if r['subob_rub_neu_label'] == 2:
sentiment = 0 # 0 中性
elif r['subob_rub_neu_label'] == -1:
sentiment = triple_classifier(r) # 1 高兴、2 愤怒、3 悲伤、0无情感
if sentiment == 0:
sentiment = mid_sentiment_classify(r['text'])
if sentiment == -1:
sentiment = 0 # 中性
comment = Comment(r['_id'], topicid)
comment.update_comment_sentiment(sentiment)
def one_topic_calculation_comments_v4(topicid):
"""对评论进行聚类
"""
from comment_clustering_tfidf_v4 import kmeans, tfidf_v4, text_classify, \
cluster_evaluation, choose_cluster
eventcomment = EventComments(topicid)
newsIds = eventcomment.getNewsIds()
for news_id in newsIds:
eventcomment.clear_cluster(news_id)
results = eventcomment.getNewsComments(news_id)
news = News(news_id)
inputs = []
for r in results:
r['title'] = ''
r['content'] = r['content168'].encode('utf-8')
r['text'] = r['content168']
item = ad_filter(r)
if item['ad_label'] == 0:
inputs.append(item)
# 情绪计算
for r in inputs:
sentiment = triple_classifier(r)
comment = Comment(r['_id'], topicid)
comment.update_comment_sentiment(sentiment)
MIN_CLUSTERING_INPUT = 50
MIN_CLUSTER_NUM = 2
MAX_CLUSTER_NUM = 15
if len(inputs) >= MIN_CLUSTERING_INPUT:
tfidf_word, input_dict = tfidf_v4(inputs)
results = choose_cluster(tfidf_word, inputs, MIN_CLUSTER_NUM,
MAX_CLUSTER_NUM)
# for k, v in results.iteritems():
# print k, len(v)
#评论文本聚类
cluster_text = text_classify(inputs, results, tfidf_word)
evaluation_inputs = []
for k, v in enumerate(cluster_text):
inputs[k]['label'] = v['label']
inputs[k]['weight'] = v['weight']
evaluation_inputs.append(inputs[k])
#簇评价
recommend_text = cluster_evaluation(evaluation_inputs)
for label, items in recommend_text.iteritems():
if label == 'other':
label = news.otherClusterId
if len(items):
eventcomment.save_cluster(label, news_id, int(time.time()))
if label != news.otherClusterId:
fwords = results[label]
eventcomment.update_feature_words(label, fwords)
for item in items:
comment = Comment(item['_id'], topicid)
comment.update_comment_label(label)
comment.update_comment_weight(item['weight'])
def step2_cal():
"""第二步计算，判断其他类是否需要分裂，若需要，则对其他类进行文本聚类，并做聚类评价
"""
# 聚类评价时选取TOPK_FREQ_WORD的高频词
TOPK_FREQ_WORD = 50
# 聚类评价时最小簇的大小
LEAST_SIZE = 8
# 判断其他类是否需要分裂
ifsplit = event.check_ifsplit(initializing)
print '[%s] ' % ts2datetime(
int(time.time())
), 'event ', eventid, ' split ', ifsplit, ' %s start step2' % ts2datetime(
timestamp)
if ifsplit:
inputs, kmeans_cluster_num, reserve_num = event.getOtherSubEventInfos(
initializing)
print eventid, ' after classify before split: ', len(
inputs), kmeans_cluster_num, reserve_num
if len(inputs) > 2:
items = []
for r in inputs:
r["title"] = r["title"].encode("utf-8")
r["content"] = r["content168"].encode("utf-8")
items.append(r)
# kmeans聚类
kmeans_results = kmeans(items, k=kmeans_cluster_num)
# 聚类评价
if initializing or now_hour == 0:
min_tfidf = event.get_min_tfidf()
final_cluster_results, tfidf_dict = cluster_evaluation(
kmeans_results,
top_num=reserve_num,
topk_freq=TOPK_FREQ_WORD,
least_size=LEAST_SIZE,
min_tfidf=min_tfidf)
else:
# 每小时聚类时，不用和已有簇的最小tfidf作比
final_cluster_results, tfidf_dict = cluster_evaluation(
kmeans_results,
top_num=reserve_num,
topk_freq=TOPK_FREQ_WORD,
least_size=LEAST_SIZE)
# 更新新闻簇标签，更新子事件表
for label, items in final_cluster_results.iteritems():
if label == "other":
label = event.getOtherSubEventID()
event.save_subevent(label, timestamp)
if label != event.getOtherSubEventID():
# 更新每类的tfidf
event.update_subevent_tfidf(label, tfidf_dict[label])
for r in items:
news = News(r["_id"], event.id)
news.update_news_subeventid(label)
else:
print 'inputs less than 2, kmeans aborted'
print '[%s] ' % ts2datetime(int(time.time(
))), 'event ', eventid, ' %s end step2' % ts2datetime(timestamp)
