CNTK
TWAI provides ready-to-use working environment of NGC optimized Cognitive Toolkit™. The NVIDIA Deep Learning SDK accelerates widely-used deep learning frameworks such as the Microsoft® Cognitive Toolkit™, formerly referred to as CNTK. Microsoft Cognitive Toolkit empowers you to harness the intelligence within massive datasets through deep learning by providing uncompromised ans commerciral-grade quality (scaling, speed and accuracy) and the compatibility with the programming languages and algorithms you already work with.
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py3 and py2 are different Python versions.