The latest pip versions will fail on you when the packages it needs to install are not hosted on PyPI. When you try to install MySQL Connector/Python the usually way, you get following message is:

$ sudo pip install mysql-connector-python
  Could not find any downloads that satisfy the requirement
  Some externally hosted files were ignored
    (use --allow-external mysql-connector-python to allow).

I have updated the download URL to include the MD5 checksum, and MySQL Connector/Python should now install using pip using following command:

$ sudo pip install --allow-external mysql-connector-python mysql-connector-python

Yes, you have to repeat the mysql-connector-python name.

Author’s note: Originally published January 2014, I have edited the command examples and added some extra information.