General Information - GitHub Pages
https://chainer.github.io/migration-guidepytorch-pfn-extras (ppe) pytorch-pfn-extras Python module (called PPE or "ppe" (module name) in this document) provides various supplementary components for PyTorch, including APIs similar to Chainer, e.g. Extensions, Reporter, Lazy modules (automatically infer shapes of parameters). Here are some notable features Refer to the Documentation for the full list of features.
General Information - GitHub Pages
chainer.github.io › migration-guideAdditionally, if you are mixing chainer models or optimizers with ignite and pytorch, these objects will be saved in the chainer snapshot file. The correct way to restore a snapshot is by using cpm.ignite.load_chainer_snapshot(engine, optimizer, snapshot_path) with the Chainer snapshot path.