last commit for the day

dreamer4/dreamer4.py

@@ -367,6 +367,7 @@ class ActionEmbedder(Module):
         embeds,                           # (... d)
         discrete_action_types = None,    # (na)
         continuous_action_types = None,  # (na)
+        return_split_discrete = False
 
     ):  # (... discrete_na), (... continuous_na 2)
 
@@ -389,6 +390,14 @@ class ActionEmbedder(Module):
 
             discrete_action_logits = einsum(embeds, discrete_action_unembed, '... d, na d -> ... na')
 
+        # whether to split the discrete action logits by the number of actions per action type
+
+        if exists(discrete_action_logits) and return_split_discrete:
+
+            split_sizes = self.num_discrete_actions[discrete_action_types] if exists(discrete_action_types) else self.num_discrete_actions
+
+            discrete_action_logits = discrete_action_logits.split(split_sizes.tolist(), dim = -1)
+
         # continuous actions
 
         continuous_action_mean_log_var = None

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "dreamer4"
-version = "0.0.10"
+version = "0.0.11"
 description = "Dreamer 4"
 authors = [
     { name = "Phil Wang", email = "lucidrains@gmail.com" }

tests/test_dreamer.py

@@ -271,6 +271,11 @@ def test_action_embedder():
     assert discrete_logits.shape == (2, 3, 8)
     assert continuous_mean_log_var.shape == (2, 3, 2, 2)
 
+    # return discrete split by number of actions
+
+    discrete_logits, continuous_mean_log_var = embedder.unembed(action_embed, return_split_discrete = True)
+    assert discrete_logits[0].shape == discrete_logits[1].shape == (2, 3, 4)
+
     # unembed subset of actions
 
     discrete_logits, continuous_mean_log_var = embedder.unembed(action_embed, discrete_action_types = 1, continuous_action_types = 0)