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 (University of Montreal’s deep learning/machine learning classes).