make layer stack user input more tolerant (#59)

stream/stages/generation/layer_stacks_generation.py

@@ -12,6 +12,8 @@
 
 
 class LayerStacksGenerationStage(Stage):
+    layer_stacks: list[tuple[int, ...]] | None
+
     def __init__(
         self,
         list_of_callables: list[StageCallable],
@@ -50,6 +52,9 @@ def run(self):
                     self.layer_stacks = self.get_layer_stacks_fused_multiple_fixed()
                 else:
                     self.layer_stacks = self.get_layer_stacks_fused_single()
+            else:
+                self.layer_stacks = self.fill_layer_stacks_to_completion()
+
         elif self.mode == "lbl":
             self.layer_stacks = self.get_layer_stacks_lbl()
         else:
@@ -69,19 +74,33 @@ def run(self):
 
     def only_keep_computation_node_ids(self):
         """! Update the layer stacks to only keep ids of ComputationNodes"""
-        updated_layer_stacks = []
+        assert self.layer_stacks is not None
+        updated_layer_stacks: list[tuple[int, ...]] = []
         for stack in self.layer_stacks:
-            update_stack = []
+            update_stack: list[tuple[int, ...]] = []
             for layer_id in stack:
-                n = next(n for n in self.workload.node_list if n.id == layer_id)
-                if isinstance(n, ComputationNode):
-                    update_stack.append(layer_id)
+                try:
+                    # Ignore node ids that do not exist
+                    n = next(n for n in self.workload.node_list if n.id == layer_id)
+                    if isinstance(n, ComputationNode):
+                        update_stack.append(layer_id)
+                except StopIteration:
+                    pass
             updated_layer_stacks.append(tuple(update_stack))
         self.layer_stacks = updated_layer_stacks
 
     def get_layer_stacks_lbl(self):
         return [(id,) for id in sorted([n.id for n in self.workload.node_list if isinstance(n, ComputationNode)])]
 
+    def fill_layer_stacks_to_completion(self):
+        assert self.layer_stacks is not None
+        stacks: list[tuple[int, ...]] = self.layer_stacks
+
+        for node in self.workload.node_list:
+            if not any(node.id in stack for stack in stacks):
+                stacks += [(node.id,)]
+        return stacks
+
     def get_layer_stacks_fused(self):
         cumsum = 0
         stacks = []