Python+Pandas 获取数据库并加入DataFrame

import pandas as pd
import sys
import imp
imp.reload(sys)
from sqlalchemy import create_engine
import cx_Oracle

db=cx_Oracle.connect('userid','password','10.10.1.10:1521/dbinstance')
print db.version
cr=db.cursor()
sql='select * from sys_user'
cr.execute(sql)
rs=cr.fetchall()
zz=pd.DataFrame(rs);
print zz

db.close()