PyTorch is an open-source machine learning library for Python, based on the
Torch library, used for applications such as natural language processing.
It is primarily developed by Facebook's AI Research lab.

PyTorch provides two high-level features:
* Tensor computation (like NumPy) with strong GPU acceleration
* Deep neural networks built on a tape-based autograd system

It is a popular choice for deep learning research and production due to its
flexibility and ease of use.