What is PyTorch Geometric?

PyTorch Geometric (PyG) is a library built upon PyTorch to facilitate the development of Graph Neural Networks (GNNs). It provides various methods for deep learning on graph structured data, including data handling, mini-batching, GNN layers, and training routines. PyG is commonly used for tasks like node classification, graph classification, and link prediction in domains such as social networks, molecular biology, and recommender systems.