Python中使用MySQL

今天学习到了数据库的使用，由于我的mac上之前安装好了XAMPP，所以也就是相当于安装好了MySQL；这里我在命令行里输入：

sudo /Applications/XAMPP/xamppfiles/bin/mysql.server start

开启MySQL服务，XAMPP里面显示了已开启：



后面两个服务与本文无关，可以忽略！

看了教程说“在Mac或Linux上，需要编辑MySQL的配置文件，把数据库默认的编码全部改为UTF-8。MySQL的配置文件默认存放在/etc/my.cnf或者/etc/mysql/my.cnf：”

我找了好久，都没有看到那个文件，后来就想那一定在XAMPP那个软件里面，试了试，最后终于找到了那个文件，原来path是：/Applications/XAMPP/etc/my.cnf ，在里面添加了如下内容：

[client]
default-character-set = utf8

[mysqld]
default-storage-engine = INNODB
character-set-server = utf8
collation-server = utf8_general_ci

修改之前是这样的：



修改之后是：（需要重启XAMPP里面的MySQL服务，不是简单的使用：“mysql -u root -p”重新进入MySQL）



这样就可以正确处理中文了！

后面就是安装MySQL驱动了：mysql-connector-python

QXdeMacBook-Pro:~ qx$ sudo easy_install mysql-connector-python
Searching for mysql-connector-python
Reading https://pypi.python.org/simple/mysql-connector-python/ Best match: mysql-connector-python 2.0.4
Downloading http://cdn.mysql.com/Downloads/Connector-Python/mysql-connector-python-2.0.4.zip#md5=3df394d89300db95163f17c843ef49df Processing mysql-connector-python-2.0.4.zip
Writing /tmp/easy_install-VHIorB/mysql-connector-python-2.0.4/setup.cfg
Running mysql-connector-python-2.0.4/setup.py -q bdist_egg --dist-dir /tmp/easy_install-VHIorB/mysql-connector-python-2.0.4/egg-dist-tmp-W3Jf9z
zip_safe flag not set; analyzing archive contents...
Adding mysql-connector-python 2.0.4 to easy-install.pth file

Installed /Library/Python/2.7/site-packages/mysql_connector_python-2.0.4-py2.7.egg
Processing dependencies for mysql-connector-python
Finished processing dependencies for mysql-connector-python

后面就开始写测试代码了：

QXdeMacBook-Pro:~ qx$ python
Python 2.7.6 (default, Sep  9 2014, 15:04:36)
[GCC 4.2.1 Compatible Apple LLVM 6.0 (clang-600.0.39)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import mysql.connector
>>>conn=mysql.connector.connect(user='root',password='',database='python_test',use_unicode=True)
>>> cursor=conn.cursor()
>>> cursor.execute('create table user (id varchar(20) primary key, name varchar(20))')
>>> cursor.execute('insert into user (id,name) values (%s,%s)',['1','QinXue'])
>>> cursor.rowcount
1
>>> conn.commit()
>>> cursor.close()
True
>>> cursor=conn.cursor()
>>> cursor.execute('select * from user where id = %s',['1'])
>>> values=cursor.fetchall()
>>> values
[(u'1', u'QinXue')]
>>> cursor.close()
True
>>> conn.close()

以下是需要注意的地方：

cursor.execute(‘select * from user where id = %s’,[‘1’])，这里不能写成cursor.execute(‘select * from user where id = %s’,’1’)，也就是说传入的第二个参数应该是个list

conn=mysql.connector.connect(user=’root’,password=”,database=’python_test’,use_unicode=True) ，这里打开的必须是一个存在的数据库，否则会报错！

好了，以上就是今天的全部内容！

最后附上参考链接