add simple Feed-forward network (for ESM2->chebi task)

Author: sfluegel05

chebai/models/ffn.py

@@ -0,0 +1,55 @@
+from typing import Dict, Any, Tuple
+
+from chebai.models import ChebaiBaseNet
+import torch
+from torch import Tensor
+
+class FFN(ChebaiBaseNet):
+
+    NAME = "FFN"
+
+    def __init__(self, input_size: int = 1000, num_hidden_layers: int = 3, hidden_size: int = 128, **kwargs):
+        super().__init__(**kwargs)
+
+        self.layers = torch.nn.ModuleList()
+        self.layers.append(torch.nn.Linear(input_size, hidden_size))
+        for _ in range(num_hidden_layers):
+            self.layers.append(torch.nn.Linear(hidden_size, hidden_size))
+        self.layers.append(torch.nn.Linear(hidden_size, self.out_dim))
+
+    def _get_prediction_and_labels(self, data, labels, model_output):
+        d = model_output["logits"]
+        loss_kwargs = data.get("loss_kwargs", dict())
+        if "non_null_labels" in loss_kwargs:
+            n = loss_kwargs["non_null_labels"]
+            d = data[n]
+        return torch.sigmoid(d), labels.int() if labels is not None else None
+
+    def _process_for_loss(
+        self,
+        model_output: Dict[str, Tensor],
+        labels: Tensor,
+        loss_kwargs: Dict[str, Any],
+    ) -> Tuple[Tensor, Tensor, Dict[str, Any]]:
+        """
+        Process the model output for calculating the loss.
+
+        Args:
+            model_output (Dict[str, Tensor]): The output of the model.
+            labels (Tensor): The target labels.
+            loss_kwargs (Dict[str, Any]): Additional loss arguments.
+
+        Returns:
+            tuple: A tuple containing the processed model output, labels, and loss arguments.
+        """
+        kwargs_copy = dict(loss_kwargs)
+        if labels is not None:
+            labels = labels.float()
+        return model_output["logits"], labels, kwargs_copy
+
+    def forward(self, data, **kwargs):
+        x = data["features"]
+        for layer in self.layers:
+            x = torch.relu(layer(x))
+        return {"logits": x}
+

configs/data/deepGO/deepgo2_esm2.yml

@@ -0,0 +1,5 @@
+class_path: chebai.preprocessing.datasets.deepGO.go_uniprot.DeepGO2MigratedData
+init_args:
+  go_branch: "MF"
+  max_sequence_length: 1000
+  use_esm2_embeddings: True

configs/model/ffn.yml

@@ -0,0 +1,7 @@
+class_path: chebai.models.ffn.FFN
+init_args:
+  optimizer_kwargs:
+    lr: 1e-3
+  hidden_size: 128
+  num_hidden_layers: 3
+  input_size: 2560