Theano is a Python library that allows you to define, optimize, and
evaluate mathematical expressions involving multi-dimensional arrays
efficiently. Theano features:

* tight integration with NumPy – Use numpy.ndarray in Theano-compiled functions.
* transparent use of a GPU – Perform data-intensive computations much faster than on a CPU.
* efficient symbolic differentiation – Theano does your derivatives for functions with one or many inputs.
* speed and stability optimizations – Get the right answer for log(1+x) even when x is really tiny.
* dynamic C code generation – Evaluate expressions faster.
* extensive unit-testing and self-verification – Detect and diagnose many types of errors.

Theano has been powering large-scale computationally intensive
scientific investigations since 2007. But it is also approachable
enough to be used in the classroom.