Add node for advanced merging by block.

advanced_model_merging.py

@@ -0,0 +1,30 @@
+import comfy_extras.nodes_model_merging
+
+class ModelMergeBlockNumber(comfy_extras.nodes_model_merging.ModelMergeBlocks):
+    @classmethod
+    def INPUT_TYPES(s):
+        arg_dict = { "model1": ("MODEL",),
+                              "model2": ("MODEL",)}
+
+        argument = ("FLOAT", {"default": 1.0, "min": 0.0, "max": 1.0, "step": 0.01})
+
+        arg_dict["time_embed."] = argument
+        arg_dict["label_emb."] = argument
+
+        for i in range(12):
+            arg_dict["input_blocks.{}".format(i)] = argument
+
+        for i in range(3):
+            arg_dict["middle_block.{}".format(i)] = argument
+
+        for i in range(12):
+            arg_dict["output_blocks.{}".format(i)] = argument
+
+        arg_dict["out."] = argument
+
+        return {"required": arg_dict}
+
+
+NODE_CLASS_MAPPINGS = {
+    "ModelMergeBlockNumber": ModelMergeBlockNumber,
+}