Here are 5 MNIST examples showing you how to gradually convert from pure PyTorch to PyTorch Lightning.
The transition through [LightningLite](https://pytorch-lightning.readthedocs.io/en/latest/stable/lightning_lite.rst) from pure PyTorch is optional but it might be helpful to learn about it.
#### 1. Image Classifier with Vanilla PyTorch
Trains a simple CNN over MNIST using vanilla PyTorch.
This script shows you how to scale the previous script to enable GPU and multi-GPU training using [LightningLite](https://pytorch-lightning.readthedocs.io/en/stable/starter/lightning_lite.html).
#### 3. Image Classifier - Conversion from Lite to Lightning
This script shows you how to prepare your conversion from [LightningLite](https://pytorch-lightning.readthedocs.io/en/stable/starter/lightning_lite.html) to `LightningModule`.