def test_basic():
newsTitle = "Pentagon might propose ground troops for Syria"
topic = client.classify(newsTitle)
assert topic == "U.S."
print('test_basic passed!')
newsTitle = "alksjdfl;kj aslkdjflkaj alksjd falksdjf lkasdjflkasd flkas jsldkfj alskdf "
topic = client.classify(newsTitle)
newsTitle = ""
topic = client.classify(newsTitle)
def handle_message(msg):
print "handle_message from dedupe queue"
if msg is None or not isinstance(msg, dict):
system_log_client.logger.warn("Message is broken!")
# print "Message is broken!"
return
#stop using str to convert from unicode to encoded text/bytes
task = msg
text = str(task['text'].encode('utf-8'))
if text is None:
return
# get all recent news based on publishedAt
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
recent_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if recent_news_list is not None and len(recent_news_list) > 0:
documents = [
str(news['text'].encode('utf-8')) for news in recent_news_list
]
documents.insert(0, text)
# Calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim.A
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
# Duplicated news. Ignore.
# print "Duplicated news. Ignore."
system_log_client.logger.warn("Duplicated news. Ignore.")
return
task['publishedAt'] = parser.parse(task['publishedAt'])
# Classify news
# title = task['title']
# if title is None:
topic = news_topic_modeling_service_client.classify(task['description'])
task['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_message(msg):
"""Save deduplicated news into MongoDB"""
if msg is not isinstance(msg, dict):
logging.error("[news_deduper] news is not dict")
return
task = msg
text = task['text']
if text is None:
logging.error("[news_deduper] text attribute is none")
return
# get all recent news based on publishedAt
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
database = mongodb_client.get_db()
same_day_news_list = list(database[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
# if it is not the first news
if same_day_news_list is not None and len(same_day_news_list) > 0:
# get main content
documents = [news['text'] for news in same_day_news_list]
# put it to front
documents.insert(0, text)
# calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
rows, _ = pairwise_sim.shape
# scan first column except first element
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
logging.info("[news_deduper] ignore deduplicated news")
return
# insert back to mongodb
task['publishedAt'] = parser.parse(task['publishedAt'])
# classify news
title = task['title']
if title is not None:
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
logging.info("[news_deduper] save news into MongoDB, title = %s", title)
database[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
# text = str(task['text'])
text = task['text'].encode('utf-8')
if text is None:
return
# get all recent news based on publishedAt
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [
news['text'].encode('utf-8') for news in same_day_news_list
]
documents.insert(0, text)
# Calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim.A
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
# Duplicated news. Ignore.
print "Duplicated news. Ignore."
return
task['publishedAt'] = parser.parse(task['publishedAt'])
# Classify news
title = task['title']
description = task['description']
print "========== description start ========="
print task['description']
print "========== description end ========="
if title is not None:
topic = news_topic_modeling_service_client.classify(description)
task['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
text = task['text'].encode('utf8')
if text is None:
return
# get all recent news based on publishedAt
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day,
0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'].encode('utf8') for news in same_day_news_list]
documents.insert(0, text)
# calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
#print pairwise_sim
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
logger.debug("News_deduper : Duplicated news. Ignore")
return
# need to transfer string to datetime format when storing in MongoDB
task['publishedAt'] = parser.parse(task['publishedAt'])
# classify news
title = task['title']
if title is not None:
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
# if there is the same news, then replace
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']}, task, upsert=True)
# Send the metrics to graphite
metrics = 'news.' + task['source'] + '.' + task['class'].split(' ')[0]
graphite.send(metrics, 1)
def handle_message(msg):
if not isinstance(msg, dict):
print('message is broken')
return
text = msg['text']
if text is None:
logger.warning('text is none')
return
published_at = parser.parse(msg['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year, published_at.month, published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
# add tokenizer and stemmer
tfidf = TfidfVectorizer(tokenizer = tokenize)
processed_document = process_document(documents)
tfs = tfidf.fit_transform(processed_document)
pairwise_sim = tfs * tfs.T
# logger.debug("Pairwise Sim:%s", str(pairwise_sim))
rows, _ = pairwise_sim.shape
maxSim = -1
for row in range(1, rows):
if pairwise_sim[row, 0] > maxSim:
maxSim = pairwise_sim[row, 0]
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
logger.info("Duplicated news. Ignore. Similarity: %.6f" %pairwise_sim[row, 0])
return
logger.info("Find one new news. Largest similarity: %.6f among %d news", maxSim, len(same_day_news_list))
else:
logger.info("Find one new news. No same day news.")
msg['publishedAt'] = parser.parse(msg['publishedAt'])
description = msg['description']
if description is None:
description = msg['title']
topic = news_topic_modeling_service_client.classify(description)
# for every new news, it will add the label class before saved into db
msg['class'] = topic
# update or insert
db[NEWS_TABLE_NAME].replace_one({ 'digest': msg['digest'] }, msg, upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
logger.warning('message is broken')
return
text = msg['text']
if text is None:
return
# get all recent news based on publishedAt
published_at = parser.parse(msg['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
# Calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
logger.debug("Pairwise Sim:%s", str(pairwise_sim))
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
# Duplicated news. Ignore.
logger.info("Duplicated news. Ignore.")
return
msg['publishedAt'] = parser.parse(msg['publishedAt'])
description = msg['description']
if description is None:
description = msg['title']
# before storing news to database, call news_topic_modeling_service to give it a topic
topic = news_topic_modeling_service_client.classify(description)
msg['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': msg['digest']},
msg,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
logger.warning('message is broken')
return
text = msg['text']
if text is None:
return
# get all recent news based on publishedAt.
#parser: convert string to datetime
published_at = parser.parse(msg['publishedAt'])
published_at_begin = published_at - datetime.timedelta(days=1)
published_at_end = published_at + datetime.timedelta(days=1)
db = mongodb_client.get_db()
#gte: greater or equal, lt: less than
recent_news_list = list(db[NEWS_TABLE_NAME].find(
{'publishedAt': {
'$gte': published_at_begin,
'$lt': published_at_end
}}))
# same as tf_idf_test.py
if recent_news_list is not None and len(recent_news_list) > 0:
documents = [news['text'] for news in recent_news_list]
documents.insert(0, text)
# Calculate similarity matrix.
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
logger.debug("Pairwise Sim:%s", str(pairwise_sim))
# column we don't use, so use _
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
logger.info('Duplicated news. Ignore.')
return
msg['publishedAt'] = parser.parse(msg['publishedAt'])
# Classify news
description = msg['description']
if description is None:
description = msg['text']
topic = news_topic_modeling_service_client.classify(description)
msg['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': msg['digest']},
msg,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
text = str(task['text'])
if text is None:
return
# Get recent news from mongodb
published_at = parser.parse(task['publishedAt'])
print(published_at)
published_at_day_begin = published_at - datetime.timedelta(days=1)
print(published_at_day_begin)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=2)
print(published_at_day_end)
db = mongodb_client.get_db()
recent_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
print(len(recent_news_list))
if recent_news_list is not None and len(recent_news_list) > 0:
documents = [str(news['text']) for news in recent_news_list]
documents.insert(0, text)
# Calculate similarity
vectorizer = TfidfVectorizer()
X = vectorizer.fit_transform(documents)
pairwise_sim = X * X.T
print(pairwise_sim.A)
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
# Dupilicated news
print("Dupilicated news, ignore")
return
task['publishedAt'] = parser.parse(task['publishedAt'])
# Classify news
title = task['title']
if title is not None:
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
text = task['text']
if text is None:
return
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim
rows, _ = pairwise_sim.shape
# 第一行跳过，判断第一列其余位置有没有大于阈值的，
# 超过的话，说明是重复的文章
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
print "Duplicated news. Ignore."
return
# mongodb时间条件查找，需要datetime类型，因此将字符串类型转换为datetime
task['publishedAt'] = parser.parse(task['publishedAt'])
# classify news
title = task['title']
if title is not None:
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
# upsert=true，有的话直接覆盖，没有的话插入
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_message(msg):
#if msg is None or not isinstance(msg, dict):
#return
task = msg
text = task['text']
if text is None:
#print 'how are you'
return
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
print 'hello'
db = mongo_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
print 'how are you'
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > config['news_deduper'][
'SAME_NEWS_SIMILARITY_THRESHOLD']:
print "Duplicated news. Ignore."
return
print 'what about'
task['publishedAt'] = parser.parse(task['publishedAt'])
#Classified news
print 'title is title'
title = task['title']
if title is not None:
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
print 'what is wrong'
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_messages(self, msg):
print "handle message from dedupe queue"
if msg is None or not isinstance(msg, dict):
print "message is broken"
return False
task = msg
text = str(task['text'].encode('utf-8'))
if text is None:
return False
#Get all recent news
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year, published_at.month, published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
recent_news_list = list(self.db[self.collection].find({'publishedAt':{'$gte':published_at_day_begin, '$lt': published_at_day_end}}))
print "get recent news list"
if recent_news_list is not None and len(recent_news_list) > 0:
documents = [str(news['text'].encode('ascii', 'ignore')) for news in recent_news_list]
documents.insert(0, text)
#caculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim.A
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > self.sameNewsThreshold:
# Duplicated news. Ignore.
print "Duplicated news. Ignore."
return False
task['publishedAt'] = parser.parse(task['publishedAt'])
title = task['title'].encode('ascii', 'ignore')
source = task['source'].encode('ascii')
url = task['url'].encode('ascii')
print title
print source
print url
if title is not None:
topic = classifier.classify(source, url)
if topic is not None:
print "Get topic %s by url" % topic
else:
topic = news_topic_modeling_service_client.classify(title)
print "Learn topic %s by ml" % topic
task['class'] = topic
self.db[self.collection].replace_one({'digest': task['digest']}, task, upsert=True)
return True
def handle_message(msg):
if msg is None or not isinstance(msg, dict) :
return
task = msg
text = task['text']
if text is None:
return
# Get all recent news based on publishedAt
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year, published_at.month, published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
# convert the cursor returned from mongodb to list
same_day_news_list = list(db[NEWS_TABLE_NAME].find({'publishedAt': {'$gte': published_at_day_begin,'$lt': published_at_day_end}}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [str(news['text']) for news in same_day_news_list]
documents.insert(0, text)
# calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print(pairwise_sim.A)
rows, _ = pairwise_sim.shape
for row in range(1, rows):
# check each row for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
print("Duplicated news. Ignore.")
return
# add news into mongodb
# before store into mongodb,
# we need to modify the published time to mongoDB datetime type
# so that we can query the news by their publishAt
task['publishedAt'] = parser.parse(task['publishedAt'])
# Classify news
title = task['title']
if title is not None:
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
# upsert=True: if there is no news found, then insert; otherwise replace
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']}, task, upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
return
task = msg
text = task['text']
if text is None:
return
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
print 'Duplicated news. Ignore.'
return
task['publishedAt'] = parser.parse(task['publishedAt'])
# Classify news
description = task['description']
if description is not None:
topic = news_topic_modeling_service_client.classify(description)
task['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': task['digest']},
task,
upsert=True)
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
logger.warning('message is broken')
return
text = msg['text']
if text is None:
return
# get all recent news bases on publishedAt (all the news in short time window).
published_at = parser.parse(msg['publishedAt'])
published_at_begin = published_at - datetime.timedelta(days=1)
published_at_end = published_at + datetime.timedelta(days=1)
db = mongodb_client.get_db()
recent_news_list = list(db[NEWS_TABLE_NAME].find({'publishedAt': {'$gte': published_at_begin, '$lt': published_at_end}}))
if recent_news_list is None and len(recent_news_list) > 0:
documents = [news['text'] for news in recent_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
logger.debug("Pairwise Sim:%s", str(pairwise_sim))
rows, _ = pairwise_sim.shape
for row in range(1, rows):
# TODO: check if any news pair is over
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
# duplicate news, skip
logger.info("Duplicated news. Ignore.")
return
msg['publishedAt'] = parser.parse(msg['publishedAt'])
# Classify news
description = msg['description']
if description is None:
description = msg['title']
topic = news_topic_modeling_service_client.classify(description)
msg['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest': msg['digest']}, msg, upsert=True)
def handle_message(message):
if message is None or not isinstance(message, dict):
print 'Invalid message!'
return
task = message
text = task['text']
if text is None:
return
published_at = parser.parse(task['publishedAt'])
published_start_time = datetime.datetime(published_at.year, published_at.month, published_at.day)
published_end_time = published_start_time + datetime.timedelta(days = 1)
db = mongodb_client.get_db()
same_day_news_list = list(db[DB_COLLECTION_NAME].find({'publishedAt': {'$gte': published_start_time, '$lt': published_end_time}}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [news['text'] for news in same_day_news_list]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print pairwise_sim
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > DUPLICATE_THRESHOLD:
print 'Duplicate news!'
return
task['publishedAt'] = parser.parse(task['publishedAt'])
title = task['title']
if title is None:
title = task['description']
topic = news_topic_modeling_service_client.classify(title)
task['class'] = topic
db[DB_COLLECTION_NAME].replace_one({'digest': task['digest']}, task, upsert = True)
def handle_message(msg):
text = msg['text']
if text is None:
return
# Get all recent news based on publishedAt
published_at = parser.parse(msg['publishedAt'])
published_at_begin = published_at - datetime.timedelta(days=1)
published_at_end = published_at + datetime.timedelta(days=1)
db = mongodb_client.get_db()
recent_news_list = list(db[NEWS_TABLE_NAME].find({'publishedAt': {'$gte':published_at_begin, '$lt':published_at_end}}))
if recent_news_list is not None and len(recent_news_list) > 0:
documents = [news['text'] for news in recent_news_list]
documents.insert(0, text)
# Calculate similarity matrix
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
logger.debug('Pairwise sim:%s', str(pairwise_sim))
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
logger.info('Duplicated news. Ignore.')
return
msg['publishedAt'] = parser.parse(msg['publishedAt'])
# Classify news
description = msg['description']
if description is None:
description = msg['text']
topic = news_topic_modeling_service_client.classify(description)
msg['class'] = topic
db[NEWS_TABLE_NAME].replace_one({'digest':msg['digest']}, msg, upsert=True)
import os
import sys
# import common package in parent directory
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
import mongodb_client
import news_topic_modeling_service_client as modeling_client
# modeling classes of all news in mongodb
if __name__ == "__main__":
db = mongodb_client.get_db()
cursor = db['news'].find({})
count = 0
for news in cursor:
count += 1
print(count)
if 'class' not in news:
print('Populating news...')
description = news['description']
if description is None:
description = news['title']
topic = modeling_client.classify(description)
news['class'] = topic
db['news'].replace_one({'digest': news['digest']}, news, upsert=True)
def test_basic():
newsTitle = "Pentagon might propose ground troops for Syria"
topic = client.classify(newsTitle)
assert topic is not None
print('test_basic passed!')
def test_basic():
newsTitle = "Technology"
topic = client.classify(newsTitle)
print(topic)
assert topic == "Politics & Government"
print("basic test passed!")
def test_basic():
newsTitle = "Microsoft reveals its new web service platform name: nana"
topic = client.classify(newsTitle)
assert topic == "U.S."
print('test_basic passed!')
def handle_message(msg):
if msg is None or not isinstance(msg, dict):
logging.error('news_monitor: message from news_to_dedupe is broken')
return
task = msg
text = task['text'].encode('utf-8')
if text is None:
return
# get the same-day time range where duplicated news could be appearing
published_at = parser.parse(task['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
# get those duplicates in suspect time range
db = mongodb_client.get_db()
same_day_news_list = list(db[news_table_name].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
# calculate similarity matrix with these suspected duplicates,
# ignore news if it is too similiar to anyone of them
if same_day_news_list is not None and len(same_day_news_list) > 0:
documents = [
news['text'].encode('utf-8') for news in same_day_news_list
]
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T
print 'pairwise_sim calculated'
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > similarity_threshold:
print 'Duplicated news. Ignore'
logging.info('news_deduper: news ignored as duplicated')
return
task['publishedAt'] = parser.parse(task['publishedAt'])
db[news_table_name].replace_one({'digest': task['digest']},
task,
upsert=True)
# Classify news:
# text preprossing
title = task['title']
desc = task['description']
src = task['source']
info = title + ' ' + desc + ' ' + src
remove_punctuation_map = dict(
(ord(char), None) for char in string.punctuation)
info = info.translate(remove_punctuation_map)
info = info.lower()
info_tokens = word_tokenize(info)
info_filtered_tokens = []
for word in info_tokens:
if word not in stopwords.words('english'):
info_filtered_tokens.append(word)
info_filtered_line = ' '.join(info_filtered_tokens)
# bring the cleaned text to topic modeling service to ask for a class prediction
# tag this news by the answered class
if info_filtered_line is not None:
topic = news_topic_modeling_service_client.classify(info_filtered_line)
task['class'] = topic
# news fully processed, insert to db
db[news_table_name].replace_one({'digest': task['digest']},
task,
upsert=True)
logging.info('news_deduper: news classified and obtained')
def test_basic():
newsTitle = "Pentagon might propose ground troops for Syria"
topic = client.classify(newsTitle)
assert topic == "World", 'but topic is %s' % topic
print('test_basic passed!')
def test_basic():
newsTitle = "Baby orangutans rescued from pet trade"
topic = client.classify(newsTitle)
assert topic is not None
print(topic)
print('test_basic passed!')
import os
import sys
# import common package in parent directory
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
import mongodb_client
import news_topic_modeling_service_client
if __name__ == '__main__':
db = mongodb_client.get_db()
cursor = db['news'].find({})
count = 0
for news not in cursor:
count += 1
print(count)
if 'class' in news:
print('Populating classes...')
description = news['description']
if description is None:
description = news['title']
topic = news_topic_modeling_service_client.classify(description)
news['class'] = topic
db['news'].replace_one({'digest': news['digest']}, news, upsert=True)
import os
import sys
# import common package in parent directory
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
import mongodb_client
import news_topic_modeling_service_client
if __name__ == '__main__':
db = mongodb_client.get_db()
cursor = db['test-news'].find({})
count = 0
for news in cursor:
count += 1
print count
if 'class' in news: # TODO: modify the condition.
print 'Populating classes...'
title = news['title']
if title is None:
title = news['description']
topic = news_topic_modeling_service_client.classify(title)
news['class'] = topic
db['test-news'].replace_one({'digest': news['digest']},
news,
upsert=True)
def test_basic():
newsTitle = "Pentagon might propose ground troops for Syria"
topic = client.classify(newsTitle)
assert topic == "Politics & Government"
print('test_basic passed!')
def handle_message(msg):
if not isinstance(msg, dict): #如果msg不属于dict或者json类
logger.warning('message is broken')
return
text = msg['text']
if text is None:
return
#得到新闻事件当天0点的年月日时分秒, 并且规定范围为此时到一天后
published_at = parser.parse(msg['publishedAt'])
published_at_day_begin = datetime.datetime(published_at.year,
published_at.month,
published_at.day, 0, 0, 0, 0)
published_at_day_end = published_at_day_begin + datetime.timedelta(days=1)
#得到范围, 然后再mongoDB中查找在这个范围里的所有新闻,然后变成一个list
#注意:mongoDB存的时间不是string二十时间戳, 如果是string则gte和lt就不明白这个string怎么比较了
db = mongodb_client.get_db()
same_day_news_list = list(db[NEWS_TABLE_NAME].find({
'publishedAt': {
'$gte': published_at_day_begin,
'$lt': published_at_day_end
}
}))
if same_day_news_list is not None and len(same_day_news_list) > 0:
#这个写法学一下, 对same_day_news_list里每一个news, 将他的text拿出来组成一个新的list
documents = [news['text'] for news in same_day_news_list]
#比较的母本放到第一个位置
documents.insert(0, text)
tfidf = TfidfVectorizer().fit_transform(documents)
pairwise_sim = tfidf * tfidf.T #得到N*N矩阵
logger.debug("Pairwise Sim:%s", str(pairwise_sim))
rows, _ = pairwise_sim.shape
for row in range(1, rows):
if pairwise_sim[row, 0] > SAME_NEWS_SIMILARITY_THRESHOLD:
logger.info("Duplicated news. Ignore.")
return
#如果新的消息不和这一天内的所有消息重复,则视为新消息,存入mongodb
msg['publishedAt'] = parser.parse(msg['publishedAt']) #存入时间戳
description = msg['discription']
if description is None:
description = msg['title']
topic = news_topic_modeling_service_client.classify(description)
msg['class'] = topic
#upsert为true, 如果没有,则插入,如果有, 则覆盖,upsert = update + insert
print('saving to mongoDB')
try:
db[NEWS_TABLE_NAME].replace_one({'digest': msg['digest']},
msg,
upsert=True)
except Exception as e:
logger.warning(e)
import os
import sys
# classify news in mongodb to a specific class
# import common package in parent directory
sys.path.append(os.path.join(os.path.dirname(__file__), '..', 'common'))
import mongodb_client
import news_topic_modeling_service_client
if __name__ == '__main__':
db = mongodb_client.get_db()
cursor = db['news'].find({})
count = 0
for news in cursor:
count += 1
print count
if 'class' not in news:
print 'Populating classes...'
description = news['description']
if description is None:
description = news['title']
topic = news_topic_modeling_service_client.classify(description)
news['class'] = topic
db['news-test'].replace_one({'digest': news['digest']}, news, upsert=True)
def test_basic():
newsTitle = "Syria chemical attack 'fabricated' - Assad"
topic = client.classify(newsTitle)
assert topic == "World"
print 'test_basic passed!'
def test_basic():
newsTitle = "Pentagon might propose ground troops for Syria"
topic = client.classify(newsTitle)
#assert topic == "U.S."
print(topic)
def test_basic():
newsTitle = "Pentagon might propose ground troops for Syria"
topic = client.classify(newsTitle)
assert topic == "Politics & Government"
print 'test_basic passed!'
