python链接postgresql

#需要安装的库
sudo apt-get install build-dep python-psycopg2
pip install psycopg2

#!/usr/bin/python
# -*- coding: UTF-8 -*-

import psycopg2
#连接数据库
conn = psycopg2.connect(database="sde_pg_10_3", user="postgres", password="pgsql_93", host="docker703.gdepb.gov.cn", port="2932")
cur = conn.cursor()
cur.execute("update water_quality_level set level_html=''")
conn.commit()
#查询使用
#rows = cur.fetchall()
#print(rows)
#for row in rows:
   #print "ID = ", row[0]
   #print "NAME = ", row[1]

cur.close()
conn.close()