Let us start an interactive session (e.g. python or ipython) and import Theano.
>>> from theano import *
Many of symbols you will need to use are in the tensor subpackage of Theano. Let’s import that subpackage under a handy name like T (many tutorials use this convention).
>>> import theano.tensor as T
If that worked you are ready for the tutorial, otherwise check your installation (see Installing Theano).
Throughout the tutorial, bear in mind that there is a Glossary of terminology to help you out.