一、安装:pip3 install pymysql
使用操作
1、执行SQL
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
import pymysql
# 创建连接
conn = pymysql.
connect
(host=
'127.0.0.1'
, port=3306,
user
=
'root'
, passwd=
'123'
, db=
't1'
)
# 创建游标
cursor
= conn.
cursor
()
# 执行SQL,并返回收影响行数
effect_row =
cursor
.
execute
(
"update hosts set host = '1.1.1.2'"
)
# 执行SQL,并返回受影响行数
#effect_row =
cursor
.
execute
(
"update hosts set host = '1.1.1.2' where nid > %s"
, (1,))
# 执行SQL,并返回受影响行数
#effect_row =
cursor
.executemany(
"insert into hosts(host,color_id)values(%s,%s)"
, [(
"1.1.1.11"
,1),(
"1.1.1.11"
,2)])
# 提交,不然无法保存新建或者修改的数据
conn.
commit
()
# 关闭游标
cursor
.
close
()
# 关闭连接
conn.
close
()
|
2、获取新创建数据自增ID
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
import pymysql
conn = pymysql.
connect
(host=
'127.0.0.1'
, port=3306,
user
=
'root'
, passwd=
'123'
, db=
't1'
)
cursor
= conn.
cursor
()
cursor
.executemany(
"insert into hosts(host,color_id)values(%s,%s)"
, [(
"1.1.1.11"
,1),(
"1.1.1.11"
,2)])
conn.
commit
()
cursor
.
close
()
conn.
close
()
# 获取最新自增ID
new_id =
cursor
.lastrowid
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3、获取查询数据
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
import pymysql
conn = pymysql.
connect
(host=
'127.0.0.1'
, port=3306,
user
=
'root'
, passwd=
'123'
, db=
't1'
)
cursor
= conn.
cursor
()
cursor
.
execute
(
"select * from hosts"
)
# 获取第一行数据
row_1 =
cursor
.fetchone()
# 获取前n行数据
# row_2 =
cursor
.fetchmany(3)
# 获取所有数据
# row_3 =
cursor
.fetchall()
conn.
commit
()
cursor
.
close
()
conn.
close
()
|
注:在fetch数据时按照顺序进行,可以使用cursor.scroll(num,mode)来移动游标位置,如:
- cursor.scroll(1,mode='relative') # 相对当前位置移动
- cursor.scroll(2,mode='absolute') # 相对绝对位置移动
4、fetch数据类型
关于默认获取的数据是元祖类型,如果想要或者字典类型的数据,即:
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
import pymysql
conn = pymysql.
connect
(host=
'127.0.0.1'
, port=3306,
user
=
'root'
, passwd=
'123'
, db=
't1'
)
# 游标设置为字典类型
cursor
= conn.
cursor
(
cursor
=pymysql.cursors.DictCursor)
r =
cursor
.
execute
(
"call p1()"
)
result =
cursor
.fetchone()
conn.
commit
()
cursor
.
close
()
conn.
close
()
|
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