本文实例讲述了Python3.6实现连接mysql或mariadb的方法。分享给大家供大家参考,具体如下:
python3.6的安装查看前面一篇文章http://www.zzvips.com/article/123285.html
mysql或mariadb数据库的安装查看以前的相关文章,这里不再赘述
首先在mariadb数据库中创建相应的库和表:
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MariaDB [(none)]> create database oracle default character set utf8 default collate utf8_general_ci;
Query OK, 1 row affected (0.00 sec)
MariaDB [oracle]> create table oracle_indexmonitor( index_name varchar (200) not null , ipaddress varchar (39) not null , tnsname varchar (100) not null , insert_time timestamp default current_timestamp , primary key (index_name) ) engine=InnoDB default charset=utf8;
Query OK, 0 rows affected (0.01 sec)
MariaDB [oracle]> desc oracle_indexmonitor;
+ -------------+--------------+------+-----+-------------------+-------+
| Field | Type | Null | Key | Default | Extra |
+ -------------+--------------+------+-----+-------------------+-------+
| index_name | varchar (200) | NO | PRI | NULL | |
| ipaddress | varchar (39) | NO | | NULL | |
| tnsname | varchar (100) | NO | | NULL | |
| insert_time | timestamp | NO | | CURRENT_TIMESTAMP | |
+ -------------+--------------+------+-----+-------------------+-------+
4 rows in set (0.00 sec)
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安装需要用到的模块pymysql:
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[root@wadeson Python - 3.6 . 1 ] # /usr/local/python36/bin/pip3 install PyMysql
Collecting PyMysql
Downloading PyMySQL - 0.7 . 11 - py2.py3 - none - any .whl ( 78kB )
100 % |¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€¨€| 81kB 87kB / s
Installing collected packages: PyMysql
Successfully installed PyMysql - 0.7 . 11
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检测模块是否安装成功:
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[root@wadeson Python - 3.6 . 1 ] # python
Python 3.6 . 1 (default, Jul 13 2017 , 15 : 41 : 38 )
[GCC 4.4 . 7 20120313 (Red Hat 4.4 . 7 - 18 )] on linux
Type "help" , "copyright" , "credits" or "license" for more information.
>>> import pymysql
>>> exit()
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然后编写py脚本:
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[root@wadeson Python - 3.6 . 1 ] # cd /root/tools/scripts/
[root@wadeson scripts] # vim connectmysql.py
#!/usr/bin/python
#coding=utf8
import pymysql
#连接数据库,host、账号、密码、库
db = pymysql.connect( 'localhost' , 'root' , 'redhat' , 'oracle' )
#创建游标使用的cursor方法
cursor = db.cursor()
#使用execute方法执行sql语句
cursor.execute( 'select version()' )
#使用fetchone方法获取单条数据
data = cursor.fetchone()
print ( 'Database version:%s' % data)
#关闭游标,并关闭数据库
cursor.close()
db.close()
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[root@wadeson scripts] # python connectmysql.py
Database version: 5.5 . 55 - MariaDB
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note:
Python查询Mysql使用 fetchone()
方法获取单条数据, 使用fetchall()
方法获取多条数据。
fetchone()
: 该方法获取下一个查询结果集。结果集是一个对象fetchall()
: 接收全部的返回结果行.rowcount
: 这是一个只读属性,并返回执行execute()方法后影响的行数。
note:如果使用以上方法安装报错:ssl模块不可用
那么可以使用编译安装:
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wget https: / / pypi.python.org / packages / f5 / d9 / 976c885396294bb1c4ca3d013fd2046496cde2efbb168e4f41dd12552dd9 / PyMySQL - 0.7 . 6.tar .gz #md5=d1353d9ad6e6668c3c463603b12cadb0
tar xf PyMySQL - 0.7 . 6.tar .gz
cd PyMySQL - 0.7 . 6
python setup.py build
python setup.py install
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然后验证是否安装成功:
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[root@oracle PyMySQL - 0.7 . 6 ] # python
Python 3.6 . 1 (default, Jul 13 2017 , 14 : 31 : 18 )
[GCC 4.4 . 7 20120313 (Red Hat 4.4 . 7 - 17 )] on linux
Type "help" , "copyright" , "credits" or "license" for more information.
>>> import pymysql
>>>
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希望本文所述对大家Python程序设计有所帮助。
原文链接:http://www.cnblogs.com/jsonhc/p/7161032.html