Theano

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Description

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 calculations up to 140x faster than with CPU.(float32 only)
efficient symbolic differentiation – Theano does your derivatives for function 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).