python下导入MySQLdb后的问题 python使用MySQLdb库时，? 400 报错

python下导入MySQLdb后的问题 python使用MySQLdb库时，? 400 报错

python使用MySQLdb库时，

>>> import MySQLdb
>>> db = MySQLdb.connect(user='root', db='mysql', passwd='111', host='localhost')

然后出错，错误信息：

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.6/site-packages/MySQL_python-1.2.3-py2.6-linux-i686.egg/MySQLdb/__init__.py", line 81, in Connect
    return Connection(*args, **kwargs)
  File "/usr/lib/python2.6/site-packages/MySQL_python-1.2.3-py2.6-linux-i686.egg/MySQLdb/connections.py", line 187, in __init__
    super(Connection, self).__init__(*args, **kwargs2)
_mysql_exceptions.OperationalError: (2002, "Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)")

/etc/my.cnf文件内容：

[mysqld]
datadir=/home/mysql/data
socket=/home/mysql/server/mysql.sock
user=mysql
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

[mysql]
socket=/home/mysql/server/mysql.sock

[client]
socket=/home/mysql/server/mysql.sock

请问怎么解决呢？