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//www.haodaima.com/article/108938.htm
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:
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)
安装需要用到的模块pymysql:
[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
检测模块是否安装成功:
[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()
然后编写py脚本:
[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()
[root@wadeson scripts]# python connectmysql.py Database version:5.5.55-MariaDB
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:
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
然后验证是否安装成功:
[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 >>>
希望本文所述对大家Python程序设计有所帮助。
本文Python3.6实现连接mysql或mariadb的方法分析到此结束。懦弱的人只会裹足不前,莽撞的人只能引为烧身,仅有真正勇敢的人才能所向披靡。小编再次感谢大家对我们的支持!