python3 连接oracle

#!/usr/bin/env python
import time
start = time.clock()
 
import cx_Oracle
tns = cx_Oracle.makedsn('127.0.0.1', '1534', 'dsn')
db = cx_Oracle.connect('username', 'password', tns)
def sqlSelect(sql, db):
    cur=db.cursor()
    cur.execute(sql)
    result=cur.fetchall()
    cur.close()
    return result
 
sql_1 = " "
sql_2 = " "
sql_3 = " "
 
sql_list = [sql_1, sql_2, sql_3]
for sql in sql_list:
    result = sqlSelect(sql, db)
    print(result[0][0])
 
end = time.clock()  
print("nRunning time: %f s" % (end - start))