python+mysql

во 2 питоне есть MySQLdb, в 3 его нет. Самая простая замена:

import pymysql

pymysql.install_as_MySQLdb()

Более полный список вариантов

http://stackoverflow.com/a/25724855/1421442

There are currently a few options for using Python 3 with mysql:

https://pypi.python.org/pypi/mysql-connector-python

• Officially supported by Oracle
• Pure python
• A little slow
• Not compatible with MySQLdb

https://pypi.python.org/pypi/pymysql

• Pure python
• Faster than mysql-connector
• Almost completely compatible with MySQLdb, after calling pymysql.install_as_MySQLdb()

https://github.com/nakagami/CyMySQL

• fork of pymysql with optional C speedups

https://pypi.python.org/pypi/mysqlclient

• Django's recommended library.
• Friendly fork of the original MySQLdb, hopes to merge back some day
• The fastest implementation, as it is C based.
• The most compatible with MySQLdb, as it is a fork

benchmarks here: https://github.com/methane/mysql-driver-benchmarks