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DataConnector.py
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DataConnector.py
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import pymysql
class DataConnector:
def getCnct(self, dbname):
config = {
'host': '127.0.0.1',
# 'host': '192.168.0.100',
'port': 3306,
'user': 'root',
'password': 'test',
'db': dbname,
'charset': 'utf8',
'cursorclass': pymysql.cursors.DictCursor
}
cnct = pymysql.connect(**config)
# 使用 utf-8
cnct.cursor().execute("SET NAMES utf8")
return cnct
class WeiboConnector(DataConnector):
# cnct = None
def __init__(self):
self.cnct = self.getCnct("sina_weibo")
def retrieve(self, size=None):
cursor = self.cnct.cursor()
query = '''
select * from optimized_weibo limit 20, 60;
'''
cursor.execute(query)
if size is None:
result = cursor.fetchall()
else:
result = cursor.fetchmany(size)
cursor.close()
return result
def retrieve_mock(self):
return ''
class WikiConnector(DataConnector):
# cnct = None
def __init__(self):
self.cnct = self.getCnct("wikipedia")
def insertWikiDoc(self, doc):
cursor = self.cnct.cursor()
query = '''
INSERT INTO docs_full_size (`title`, `abstract`, `url`)
VALUES ("%s", "%s", "%s");
'''
try:
cursor.execute(query % (doc["title"] + "", doc["abstract"] + "", doc["url"] + ""))
self.cnct.commit()
except Exception:
print("error=>", doc)
return True
else:
return True
finally:
cursor.close()
def removeDocs(self):
cursor = self.cnct.cursor()
cursor.execute("DELETE FROM docs_full_size")
self.cnct.commit()
def retrieve_by_word(self, word, top_C=50):
cursor = self.cnct.cursor()
query = '''
SELECT title, abstract from docs_full_size WHERE MATCH(abstract) AGAINST('%s') LIMIT %d;
'''
cursor.execute(query % (word, top_C))
self.cnct.commit()
result = cursor.fetchall()
cursor.close()
return result
def multi_words_query(self, words, query_type, top_w=100):
query_conditions = []
for word in words:
query_conditions.append(" match(abstract) against('%s') " % word)
if len(query_conditions) == 0:
return []
condition = query_type.join(query_conditions)
query = "SELECT title FROM docs_full_size WHERE"+condition+" LIMIT "+str(top_w)
# print("=>",query)
cursor = self.cnct.cursor()
cursor.execute(query)
result = cursor.fetchall()
cursor.close()
return result
# wiki = WikiConnector()
# rs = wiki.retrieve_by_word('数学', 10)
# for t in rs:
# print(t)
# print("=====================",t['abstract'].count('数学'))