Make your python env see the MySQL/PostgreSQL binaries

Sometimes your python env doesn't see the Mysql or PostgreSQL binaries.
You can add them easily to you Python path by adding these lines in the activate script.

$ (env) cdvirtualenv
$ (env) nano -w bin/activate

place these lines:

_OLD_VIRTUAL_PATH="$PATH"
PATH="$VIRTUAL_ENV/bin:$PATH"
PATH="$PATH:/usr/local/mysql/bin/"
PATH="$PATH:/Library/PostgreSQL/9.4/bin/"
export PATH