MySQL-python模块
模块安装
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linux：
yum install MySQL-python
windows：（如果报错需要执行license.py）
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API操作
1、插入数据
1.1 插入一条数据
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import
MySQLdb
conn
=
MySQLdb.connect(host
=
'127.0.0.1'
,user
=
'root'
,passwd
=
'123'
,db
=
'mydb'
)
cur
=
conn.cursor()
#打开游标
reCount
=
cur.execute(
'insert into UserInfo(Name,Address) values(%s,%s)'
,
(
'test'
,
'beijing'
)
)
#与字符串格式化不一样，mysql只有%s，没有别的，数字什么的也都用%s
# reCount = cur.execute('insert into UserInfo(id,Name) values(%(id)s, %(name)s)',{'id':12345,'name':'test1'})
cur.lastrowid()
#获取新插入的数据的自增ID
conn.commit()
cur.close()
conn.close()
print
reCount #在数据库中影响的行数
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1.2 插入多条数据
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import
MySQLdb
conn
=
MySQLdb.connect(host
=
'127.0.0.1'
,user
=
'root'
,passwd
=
'123'
,db
=
'mydb'
)
cur
=
conn.cursor()
li
=
[
(
'test1'
,
'usa'
),
(
'test2'
,
'china'
),
]
reCount
=
cur.executemany(
'insert into UserInfo(Name,Address) values(%s,%s)'
,li)
conn.commit()
cur.close()
conn.close()
print
reCount
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2、删除数据
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import
MySQLdb
conn
=
MySQLdb.connect(host
=
'127.0.0.1'
,user
=
'root'
,passwd
=
'1234'
,db
=
'mydb'
)
cur
=
conn.cursor()
reCount
=
cur.execute(
'delete from UserInfo'
)
conn.commit()
cur.close()
conn.close()
print
reCount
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3、修改数据
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import
MySQLdb
conn
=
MySQLdb.connect(host
=
'127.0.0.1'
,user
=
'root'
,passwd
=
'1234'
,db
=
'mydb'
)
cur
=
conn.cursor()
reCount
=
cur.execute(
'update UserInfo set Name = %s'
,(
'alin'
,))
conn.commit()
cur.close()
conn.close()
print
reCount
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4、查数据
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# ############################## fetchone/fetchmany(num) ##############################
import
MySQLdb
conn
=
MySQLdb.connect(host
=
'127.0.0.1'
,user
=
'root'
,passwd
=
'1234'
,db
=
'mydb'
)
cur
=
conn.cursor()
reCount
=
cur.execute(
'select * from UserInfo'
)
print
cur.fetchone()
print
cur.fetchone()
cur.scroll(
-
1
,mode
=
'relative'
) #‘-’号代表当前行位置往回移动，正值是向下移动。
print
cur.fetchone()
print
cur.fetchone()
cur.scroll(
0
,mode
=
'absolute'
) #absolute是绝对位置，这行代码的意思是，指向获取结构所有开头的0行位置。
print
cur.fetchone() #获取的还是第一行的数据
print
cur.fetchone()
cur.close()
conn.close()
print
reCount
# ############################## fetchall ##############################
import
MySQLdb
conn
=
MySQLdb.connect(host
=
'127.0.0.1'
,user
=
'root'
,passwd
=
'1234'
,db
=
'mydb'
)
#cur = conn.cursor(cursorclass = MySQLdb.cursors.DictCursor) #结果是列表包含字典
cur
=
conn.cursor()
reCount
=
cur.execute(
'select Name,Address from UserInfo'
)
nRet
=
cur.fetchall() #获取值是序列包含序列，如默认是列表包含元组，列表包含字典
cur.close()
conn.close()
print
reCount
print
nRet
for
i
in
nRet:
print
i[
0
],i[
1
]
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来自为知笔记(Wiz)