RHEL6.4升级到python2.7.9，然后安装 MySQL-Python-1.2.3.tar.gz，报错。解决错误之后，运行：
python2.7 -c "import MySQLdb"
失败：
>>> import MySQLdb
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/usr/local/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg/MySQLdb/__init__.py", line 19, in <module>
File "/usr/local/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg/_mysql.py", line 7, in <module>
File "/usr/local/lib/python2.7/site-packages/MySQL_python-1.2.3-py2.7-linux-x86_64.egg/_mysql.py", line 6, in __bootstrap__
ImportError: /root/.python-eggs/MySQL_python-1.2.3-py2.7-linux-x86_64.egg-tmp/_mysql.so: undefined symbol: _ZTVN10__cxxabiv120__si_class_type_infoE
找了很多解决方法都无效。转而使用mysql官方的python连接器 mysql-connector-python。下载后安装：
# for mysql5.5+
$ wget http://ftp.ntu.edu.tw/MySQL/Downloads/Connector-Python/mysql-connector-python-2.1.1.tar.gz
# for mysql 4.1, 5.0, 5.1+
$ wget http://ftp.ntu.edu.tw/MySQL/Downloads/Connector-Python/mysql-connector-python-1.2.0.tar.gz
# or download from my ftp site:
$ wget ftp://pub:pub@pepstack.com/tarball/mysql-connector-python-1.2.0.tar.gz$ wget ftp://pub:pub@pepstack.com/tarball/mysql-connector-python-2.1.1.tar.gz
# install it:
$ tar zxf mysql-connector-python-1.2.0.tar.gz
$ cd mysql-connector-python-1.2.0
$ python2.7 setup.py build
$ sudo python2.7 setup.py install
然后测试：
import mysql.connector
>>> conn=mysql.connector.connect(user='root', password='******', host='127.0.0.1', database='devops')
Traceback (most recent call last):
File "<stdin>", line 2, in <module>
File "/usr/local/lib/python2.7/site-packages/mysql/connector/__init__.py", line 176, in connect
return MySQLConnection(*args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/mysql/connector/connection.py", line 95, in __init__
self.connect(**kwargs)
File "/usr/local/lib/python2.7/site-packages/mysql/connector/abstracts.py", line 719, in connect
self._open_connection()
File "/usr/local/lib/python2.7/site-packages/mysql/connector/connection.py", line 213, in _open_connection
self._ssl)
File "/usr/local/lib/python2.7/site-packages/mysql/connector/connection.py", line 144, in _do_auth
self._auth_switch_request(username, password)
File "/usr/local/lib/python2.7/site-packages/mysql/connector/connection.py", line 180, in _auth_switch_request
raise errors.get_exception(packet)
mysql.connector.errors.DatabaseError: 1862 (HY000): Your password has expired. To log in you must change it using a client that supports expired passwords.
解决方法参考：
https://dev.mysql.com/doc/refman/5.6/en/password-expiration-sandbox-mode.html
就是mysql密码过期，重设一下就OK:
mysql> show databases;
ERROR 1820 (HY000): You must SET PASSWORD before executing this statement
mysql> SET PASSWORD=PASSWORD('new pass here');
Query OK, 0 rows affected (0.00 sec)
然后再试：
>>> config={
... 'user':'root',
... 'password':'***********',
... 'host':'127.0.0.1',
... 'database':'devops',
... }
>>> conn = mysql.connector.connect(**config)
>>> cur = conn.cursor()
>>> q="SELECT * FROM packages"
>>> cur.execute(q)
>>> for row in cur:
... print row
...
(1, u'kbc', u'krb5-workstation', u'kerberos', None, None, None)
(2, u'kbs', u'krb5-server', u'kerberos', None, None, None)
(3, u'hadn', u'hadoop-hdfs-datanode', u'hadoop', u'hadoop-hdfs-datanode', u'hann', None)
(4, u'hamr', u'hadoop-mapreduce', u'hadoop', None, None, None)
(5, u'hanm', u'hadoop-yarn-nodemanager', u'hadoop', u'hadoop-yarn-nodemanager', None, None)
(6, u'hajn', u'hadoop-hdfs-journalnode', u'hadoop', u'hadoop-hdfs-journalnode', u'hazk', None)
(7, u'hann', u'hadoop-hdfs-namenode', u'hadoop', u'hadoop-hdfs-namenode', u'hajn', None)
(8, u'hazk', u'hadoop-hdfs-zkfc', u'hadoop', u'hadoop-hdfs-zkfc', u'zksvr', None)
(9, u'halzo', u'hadoop-lzo', u'hadoop', None, None, None)
(10, u'halib', u'hadoop-libhdfs', u'halibhdfs', None, None, None)
(11, u'halibd', u'hadoop-libhdfs-devel', u'halibhdfs', None, None, None)
(12, u'hares', u'hadoop-yarn-resourcemanager', u'hadoop', u'hadoop-yarn-resourcemanager', None, None)
(13, u'hahis', u'hadoop-mapreduce-historyserver', u'hadoop', u'hadoop-mapreduce-historyserver', u'hann', None)
(14, u'hbma', u'hbase-master', u'hbase', u'hbase-master', u'hann', None)
(15, u'hbreg', u'hbase-regionserver', u'hbase', u'hbase-regionserver', u'hbma', None)
(16, u'hbrst', u'hbase-rest', u'hbase', None, None, None)
(17, u'hbthr', u'hbase-thrift', u'hbase', None, None, None)
(18, u'hvbas', u'hive', u'hive', None, None, None)
(19, u'hvhb', u'hive-hbase', u'hive', None, None, None)
(20, u'hvms', u'hive-metastore', u'hive', u'hive-metastore', None, None)
(21, u'hvsvr', u'hive-server2', u'hive', u'hive-server2', None, None)
(22, u'hvjdbc', u'hive-jdbc', u'hive', None, None, None)
(23, u'hvhc', u'hive-hcatalog', u'hive', None, None, None)
(24, u'hvwhs', u'hive-webhcat-server', u'hive', None, None, None)
(25, u'hvwhc', u'hive-webhcat', u'hive', None, None, None)
(26, u'imcat', u'impala-catalog', u'impala', u'impala-catalog', None, None)
(27, u'imsvr', u'impala-server', u'impala', u'impala-server', None, None)
(28, u'imsh', u'impala-shell', u'impala', None, None, None)
(29, u'imss', u'impala-state-store', u'impala', u'impala-state-store', None, None)
(30, u'sphis', u'spark-history-server', u'spark', None, None, None)
(31, u'spma', u'spark-master', u'spark', None, None, None)
(32, u'spwkr', u'spark-worker', u'spark', None, None, None)
(33, u'zkbas', u'zookeeper', u'zookeeper', None, None, None)
(34, u'zksvr', u'zookeeper-server', u'zookeeper', u'zookeeper-server', None, None)
>>> cur.close()
True
>>> conn.close()
>>>
一切正常！
参考：
http://dev.mysql.com/doc/connector-python/en/connector-python-installation-source.html
下载地址：
http://ftp.ntu.edu.tw/MySQL/Downloads/Connector-Python/
官方开发接口参考：
http://dev.mysql.com/doc/connector-python/en/connector-python-example-cursor-select.html