PyTorch Lightning - High-Level Training Framework Quick start PyTorch Lightning organizes PyTorch code to eliminate boilerplate while maintaining flexibility. Installation : Convert PyTorch to Lightning (3 steps): That's it! Trainer handles: - GPU/TPU/CPU switching - Distributed training (DDP, FSDP, DeepSpeed) - Mixed precision (FP16, BF16) - Gradient accumulation - Checkpointing - Logging - Progress bars Common workflows Workflow 1: From PyTorch to Lightning Original PyTorch code : Lightning version : Benefits : 40+ lines → 15 lines, no device management, automatic distributed Workflow 2: Va…