def ToBinary(doc_vector_file):
f_vector = open(doc_vector_file)
f_bin = open(doc_vector_file + '.bin', 'wb')
content = True
indexes = []
count = 0
start_time = time.clock()
while content:
content = f_vector.readline()
if content == '' or content == None:
break
if content.endswith('\n'):
content = content[:-1]
items = content.split(',')
term_list = []
for item in items:
data = item.split(':')
term_list.append((int(data[0]), float(data[1])))
indexes.append(str(f_bin.tell()))
f_bin.write(struct.pack('i', len(term_list)))
for term in term_list:
f_bin.write(struct.pack('i', term[0]))
f_bin.write(struct.pack('f', term[1]))
count += 1
if count % 1000 == 0:
print_speed(start_time, count)
write_all_text(doc_vector_file + '.bin.index', ','.join(indexes))
f_bin.close()
def get_result_thread(self):
f_name = open(self.name_file,'w')
f_content = open(self.content_file,'w')
count = 0
start_time = time.clock()
worker_count = 0
while 1:
result_list = self.result_queue.get() #得到n个结果
#检测是否有worker退出
if result_list == None:
worker_count+=1
if worker_count < self.map_worker_count:
continue
else:
break
for result in result_list:
f_name.write('%s\n' % result[0])
f_content.write('%s\n' % result[1])
count+=1
print_speed(start_time,count)
f_name.close()
f_content.close()
print_speed(start_time,count)
print u'%s已保存' % f_name.name
print u'%s已保存' % f_content.name
print u'\n程序执行完毕'
def DivideByFreqThread(term_inverter_file, threshold):
print u'将倒排索引文件按词频分为两个文件'
f_content = open(term_inverter_file)
f_low = open(term_inverter_file + '.low', 'w')
f_high = open(term_inverter_file + '.high', 'w')
i = 0
start_time = time.clock()
tmp = True
high_indexes = []
while tmp:
tmp = f_content.readline()
if tmp == None or tmp == '':
break
index = tmp.index(',')
index2 = tmp.index(',', index + 1)
count = int(tmp[index + 1:index2])
if count < threshold:
f_low.write(tmp)
else:
high_indexes.append('%s:%s' % (tmp[:index], str(f_high.tell())))
f_high.write(tmp)
i += 1
if i % 10000 == 0:
print_speed(start_time, i)
f_content.close()
f_low.close()
f_high.close()
print_speed(start_time, i)
print u'高低频词分离完毕,阈值：%d' % threshold
print u'保存%s' % f_low.name
print u'保存%s' % f_high.name
write_all_text(f_high.name + '.index', ','.join(high_indexes))
print '保存%s.index' % f_high.name
def ConvertDocVectorToTermVector(doc_vector_file, term_vector_file):
f_vector = open(term_vector_file, 'w')
f_index = open(term_vector_file + '.index', 'w')
begin = 0
step = 40000
end = step
max_term_id = 0
term_dict = {}
while 1:
print 'begin=%d,end=%d,max_term_id=%d' % (begin, end, max_term_id)
start_time = time.clock()
doc_id = 0
term_dict = {}
#循环读一次正向索引
f_doc = open(doc_vector_file, 'rb')
while 1:
try:
count = readInt(f_doc)
except:
break
#读一个文档的正向索引
for i in range(count):
term_id = readInt(f_doc)
if term_id > max_term_id: max_term_id = term_id
weight = readFloat(f_doc)
if term_id >= begin and term_id < end:
if term_dict.has_key(term_id):
term_dict[term_id].append((doc_id, weight))
else:
term_dict[term_id] = [(doc_id, weight)]
doc_id += 1
if doc_id % 1000 == 0:
print_speed(start_time, doc_id)
f_doc.close()
if len(term_dict) > 0:
term_list = term_dict.items()
term_list.sort()
for term in term_list:
term_id = term[0]
doc_list = ['%d:%f' % doc for doc in term[1]]
f_index.write('%d:%ld,' % (term_id, f_vector.tell()))
f_vector.write('%d,%s\n' % (term_id, ','.join(doc_list)))
del term_list
del term_dict
begin = end
end = begin + step
if begin > max_term_id:
break
gc.collect()
f_vector.close()
f_index.close()
print u'已保存%s' % f_vector.name
def CreateDocVector(term_inverter_file, content_list_file, doc_vector_file):
print u'创建doc vectors...'
term_dict = {} #存储(termid,每个term对应的出现文档个数)
tmp = True
f_inverter = open(term_inverter_file)
i = 0
while tmp:
tmp = f_inverter.readline()
if tmp == None or tmp == '':
break
item = MergeReader.ToKeyValue(tmp)
term_dict[item[0]] = (i, int(item[2]))
i += 1
f_inverter.close()
print u'总词数:%d' % len(term_dict)
f_doc_vector = open(doc_vector_file, 'w')
f_content = open(content_list_file)
tmp = True
start_time = time.clock()
count = 0
indexes = []
while tmp:
tmp = f_content.readline()
if tmp == None or tmp == '':
break
count += 1
term_list = Converter.ToTermList(tmp)
#w_list为weight集合
w_list = [
CalWeight(int(term[1]), term_dict[term[0]][1], N)
for term in term_list
]
#归一化
w_list = Normalize(w_list)
term_id_list = [term_dict[term[0]][0] for term in term_list]
#w_list为(termid,weight)
w_list = [
'%d:%f' % (term_id_list[i], w_list[i]) for i in range(len(w_list))
]
indexes.append(str(f_doc_vector.tell()))
f_doc_vector.write(','.join(w_list))
f_doc_vector.write('\n')
if count % 10000 == 0:
print_speed(start_time, count)
print_speed(start_time, count)
f_content.close()
f_doc_vector.close()
print '保存%s' % f_doc_vector.name
write_all_text(doc_vector_file + '.index', ','.join(indexes))
print '保存%s.index' % doc_vector_file
def CalDistance2(topic, searcher):
doc_result = {}
count = 0
start_time = time.clock()
print 'topic', topic.id, u' 词数:', len(topic.term_dict)
for term in topic.term_dict:
doc_list = searcher.search(term)
for doc in doc_list:
doc_result[doc[0]] = doc_result.get(
doc[0], 0) + float(doc[1]) * topic.term_dict[term]
count += 1
print_speed(start_time, count)
print_speed(start_time, count)
print ''
doc_result = sorted(doc_result.iteritems(),
key=itemgetter(1),
reverse=True)
return doc_result[:1000]
def CalDistance(topic, searcher):
doc_result = {}
print len(topic.term_dict)
count = 0
start_time = time.clock()
doc_list = []
for term in topic.term_dict:
doc_list.extend(searcher.search(term))
count += 1
count = 0
doc_list = set(doc_list)
print len(doc_list)
start_time = time.clock()
for docid in doc_list:
term_list = searcher.searchByDocId(docid)
count += 1
if count % 1000 == 0:
print_speed(start_time, count)
print len(doc_list)
def RemoveLowWords(low_term_inverter_file, content_file):
print u'将正索引中词频低的词去掉'
file_low = open(low_term_inverter_file)
low_term_list = []
tmp = True
while tmp:
tmp = file_low.readline()
if tmp == '' or tmp == None:
break
index = tmp.index(',')
low_term_list.append(tmp[:index])
file_low.close()
low_term_set = set(low_term_list)
print u'已载入低频词表'
file_content = open(content_file)
file_content_high = open(content_file + '.high', 'w')
file_index_list = []
tmp = True
count = 0
start_time = time.clock()
while tmp:
tmp = file_content.readline()
if tmp == None or tmp == '':
break
term_list = ContentFile.ToTermList(tmp[:-1])
term_list = [
'%s:%s' % term for term in term_list if term[0] not in low_term_set
]
file_index_list.append(str(file_content_high.tell()))
file_content_high.write(','.join(term_list))
file_content_high.write('\n')
count += 1
if count % 10000 == 0:
print_speed(start_time, count)
file_content.close()
file_content_high.close()
print_speed(start_time, count)
print u'已保存%s' % file_content_high.name
file_content_high_index = open(content_file + '.high.index', 'w')
file_content_high_index.write(','.join(file_index_list))
file_content_high_index.close()
print u'已保存%s' % file_content_high_index.name
def ReduceSingleThread(content_file):
print u'创建倒排索引...'
worker = ReduceWorker()
reader = IOWorker([content_file], 20000)
doc_list = []
count = 0
save_count = 0
start_time = time.clock()
clear_dir('tmp')
while 1:
task_raw_data = reader.GetLines()
data_count = len(task_raw_data)
if data_count == 0:
break
doc_list = Converter.ToDocList(task_raw_data, count)
count += data_count
term_inverter_list = worker.run(doc_list)
term_inverter_string = Converter.TermInverterToString(
term_inverter_list)
save_count += 1
IOWorker.SaveText('tmp\\%d' % save_count, term_inverter_string)
print_speed(start_time, count)
print u'保存完毕，共%d个临时文件' % save_count
