Python连接MySQL数据库（mysql-connector-python）

本文介绍的库是mysql-connector-python，它是MySQL的Python驱动，使用它你可以连接MySQL数据库，访问、操作表和数据。MySQL的Python驱动也不少，但是mysql-connector-python是最流行、最稳定的。

很久以前，我做过使用MySQL的C API操作数据库，相比之下，Python更加简洁、方便。

#1 安装 MySQL connector

mysql-connector-python支持Linux、Mac OS X和Windows系统。

mysql-connector-python的下载地址http://dev.mysql.com/downloads/connector/python/。

我以Ubuntu系统Python2.7为例：

方法一：使用apt安装：

1	$ sudo apt install python-mysql.connector

方法二：使用pip安装：

1	$ sudo pip install mysql-connector-python

方法三：安装最新版

1 2	$ wget http://cdn.mysql.com//Downloads/Connector-Python/mysql-connector-python-cext_2.1.3-1ubuntu15.04_amd64.deb $ sudo dpkg -i mysql-connector-python-cext_2.1.3-1ubuntu15.04_amd64.deb

查看安装的mysql-connector-python版本：

#2 连接MySQL

连接本地MySQL数据库：

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import mysql.connector   conn = mysql.connector.connect(          user='root',          password='test1234',          host='127.0.0.1',          database='test')   # 关闭数据库 conn.close()

如果提供的用户、数据库不对，会输出如下错误信息：

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Traceback (most recent call last):   File "test.py", line 7, in <module>     database='test')   File "/usr/lib/python2.7/dist-packages/mysql/connector/__init__.py", line 162, in connect     return MySQLConnection(*args, **kwargs)   File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 129, in __init__     self.connect(**kwargs)   File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 454, in connect     self._open_connection()   File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 421, in _open_connection     self._ssl)   File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 204, in _do_auth     self._auth_switch_request(username, password)   File "/usr/lib/python2.7/dist-packages/mysql/connector/connection.py", line 240, in _auth_switch_request     raise errors.get_exception(packet) mysql.connector.errors.ProgrammingError: 1045 (28000): Access denied for user 'root'@'localhost' (using password: YES)

#3 执行SQL语句

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import mysql.connector   conn = mysql.connector.connect(          user='root',          password='test1234',          host='127.0.0.1',          database='test')   cur = conn.cursor()   # 要执行的SQL语句 query = ("SELECT * FROM sometable")   # 执行查询 cur.execute(query)   for (id, name, class, score) in cur:     print("{}, {}, {}, {}".format(id, name,class,score))   cur.close() conn.close()

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文档：http://dev.mysql.com/doc/connector-python/en/

转自：http://blog.topspeedsnail.com/archives/6018