simplify examples in readme

Author: Borda

README.md

@@ -1,4 +1,4 @@
-<div align='center'>
+from litmodels.integrations import LightningModelCheckpoint<div align='center'>
 
 # Effortless Model Management for Your Development ⚡
 
@@ -102,19 +102,10 @@ from litmodels.demos import BoringModel
 # Define the model name - this should be unique to your model
 MY_MODEL_NAME = "<organization>/<teamspace>/<model-name>"
 
-
-class LitModel(BoringModel):
-    def training_step(self, batch, batch_idx: int):
-        loss = self.step(batch)
-        # logging the computed loss
-        self.log("train_loss", loss)
-        return {"loss": loss}
-
-
 # Configure Lightning Trainer
 trainer = Trainer(max_epochs=2)
 # Define the model and train it
-trainer.fit(LitModel())
+trainer.fit(BoringModel())
 
 # Upload the best model to cloud storage
 checkpoint_path = getattr(trainer.checkpoint_callback, "best_model_path")
@@ -131,67 +122,39 @@ from litmodels.demos import BoringModel
 # Define the model name - this should be unique to your model
 MY_MODEL_NAME = "<organization>/<teamspace>/<model-name>:<model-version>"
 
-
-class LitModel(BoringModel):
-    def training_step(self, batch, batch_idx: int):
-        loss = self.step(batch)
-        # logging the computed loss
-        self.log("train_loss", loss)
-        return {"loss": loss}
-
-
 # Load the model from cloud storage
 checkpoint_path = download_model(name=MY_MODEL_NAME, download_dir="my_models")
 print(f"model: {checkpoint_path}")
 
 # Train the model with extended training period
 trainer = Trainer(max_epochs=4)
-trainer.fit(LitModel(), ckpt_path=checkpoint_path)
+trainer.fit(BoringModel(), ckpt_path=checkpoint_path)
 ```
 
 <details>
-    <summary>Advanced Checkpointing Workflow</summary>
+    <summary>Checkpointing Workflow with Lightning</summary>
 
-Enhance your training process with an automatic checkpointing callback that uploads the best model at the end of each epoch.
-While the example uses PyTorch Lightning callbacks, similar workflows can be implemented in any training loop that produces checkpoints.
+Enhance your training process with an automatic checkpointing callback that uploads the model at the end of each epoch.
 
 ```python
-import os
 import torch.utils.data as data
 import torchvision as tv
-from lightning import Callback, Trainer
-from litmodels import upload_model
+from lightning import Trainer
+from litmodels.integrations import LightningModelCheckpoint
 from litmodels.demos import BoringModel
 
 # Define the model name - this should be unique to your model
 MY_MODEL_NAME = "<organization>/<teamspace>/<model-name>"
 
-
-class LitModel(BoringModel):
-    def training_step(self, batch, batch_idx: int):
-        loss = self.step(batch)
-        # logging the computed loss
-        self.log("train_loss", loss)
-        return {"loss": loss}
-
-
-class UploadModelCallback(Callback):
-    def on_train_epoch_end(self, trainer, pl_module):
-        # Get the best model path from the checkpoint callback
-        checkpoint_path = getattr(trainer.checkpoint_callback, "best_model_path")
-        if checkpoint_path and os.path.exists(checkpoint_path):
-            upload_model(model=checkpoint_path, name=MY_MODEL_NAME)
-
-
 dataset = tv.datasets.MNIST(".", download=True, transform=tv.transforms.ToTensor())
 train, val = data.random_split(dataset, [55000, 5000])
 
 trainer = Trainer(
     max_epochs=2,
-    callbacks=[UploadModelCallback()],
+    callbacks=[LightningModelCheckpoint(model_name=MY_MODEL_NAME)],
 )
 trainer.fit(
-    LitModel(),
+    BoringModel(),
     data.DataLoader(train, batch_size=256),
     data.DataLoader(val, batch_size=256),
 )