Extracted resources to separate file

comfy_api/v3/io.py

@@ -4,9 +4,7 @@ from enum import Enum
 from abc import ABC, abstractmethod
 from dataclasses import dataclass, asdict
 from collections import Counter
-import comfy.utils
+from comfy_api.v3.resources import Resources, ResourcesLocal
-import folder_paths
-import logging
 # used for type hinting
 import torch
 from spandrel import ImageModelDescriptor
@@ -285,55 +283,6 @@ class NodeStateLocal(NodeState):
         del self.local_state[key]
 
 
-class ResourceKey(ABC):
-    def __init__(self):
-        ...
-
-class ResourceKeyFolderFilename(ResourceKey):
-    def __init__(self, folder_name: str, file_name: str):
-        self.folder_name = folder_name
-        self.file_name = file_name
-    
-    def __hash__(self):
-        return hash((self.folder_name, self.file_name))
-
-    def __eq__(self, other: object) -> bool:
-        if not isinstance(other, ResourceKeyFolderFilename):
-            return False
-        return self.folder_name == other.folder_name and self.file_name == other.file_name
-    
-    def __str__(self):
-        return f"{self.folder_name} -> {self.file_name}"
-
-class Resources(ABC):
-    def __init__(self):
-        ...
-    
-    @abstractmethod
-    def get_torch_dict(self, key: ResourceKey) -> dict[str, torch.Tensor]:
-        pass
-
-class ResourcesLocal(Resources):
-    def __init__(self):
-        super().__init__()
-        self.local_resources: dict[ResourceKey, dict[str, torch.Tensor]] = {}
-    
-    def get_torch_dict(self, key: ResourceKey) -> dict[str, torch.Tensor]:
-        cached = self.local_resources.get(key, None)
-        if cached is not None:
-            logging.info(f"Using cached resource '{key}'")
-            return cached
-        logging.info(f"Loading resource '{key}'")
-        to_return = None
-        if isinstance(key, ResourceKeyFolderFilename):
-            to_return = comfy.utils.load_torch_file(folder_paths.get_full_path_or_raise(key.folder_name, key.file_name), safe_load=True)
-
-        if to_return is not None:
-            self.local_resources[key] = to_return
-            return to_return
-        raise Exception(f"Unsupported resource key type: {type(key)}")
-
-
 @comfytype(io_type="BOOLEAN")
 class Boolean:
     Type = bool

comfy_api/v3/resources.py

@@ -0,0 +1,65 @@
+from __future__ import annotations
+import comfy.utils
+import folder_paths
+import logging
+from abc import ABC, abstractmethod
+from typing import Any
+import torch
+
+class ResourceKey(ABC):
+    Type = Any
+    def __init__(self):
+        ...
+
+class TorchDictFolderFilename(ResourceKey):
+    '''Key for requesting a torch file via file_name from a folder category.'''
+    Type = dict[str, torch.Tensor]
+    def __init__(self, folder_name: str, file_name: str):
+        self.folder_name = folder_name
+        self.file_name = file_name
+
+    def __hash__(self):
+        return hash((self.folder_name, self.file_name))
+
+    def __eq__(self, other: object) -> bool:
+        if not isinstance(other, TorchDictFolderFilename):
+            return False
+        return self.folder_name == other.folder_name and self.file_name == other.file_name
+
+    def __str__(self):
+        return f"{self.folder_name} -> {self.file_name}"
+
+class Resources(ABC):
+    def __init__(self):
+        ...
+    
+    @abstractmethod
+    def get(self, key: ResourceKey, default: Any=...) -> Any:
+        pass
+
+class ResourcesLocal(Resources):
+    def __init__(self):
+        super().__init__()
+        self.local_resources: dict[ResourceKey, Any] = {}
+    
+    def get(self, key: ResourceKey, default: Any=...) -> Any:
+        cached = self.local_resources.get(key, None)
+        if cached is not None:
+            logging.info(f"Using cached resource '{key}'")
+            return cached
+        logging.info(f"Loading resource '{key}'")
+        to_return = None
+        if isinstance(key, TorchDictFolderFilename):
+            if default is ...:
+                to_return = comfy.utils.load_torch_file(folder_paths.get_full_path_or_raise(key.folder_name, key.file_name), safe_load=True)
+            else:
+                full_path = folder_paths.get_full_path(key.folder_name, key.file_name)
+                if full_path is not None:
+                    to_return = comfy.utils.load_torch_file(full_path, safe_load=True)
+
+        if to_return is not None:
+            self.local_resources[key] = to_return
+            return to_return
+        if default is not ...:
+            return default
+        raise Exception(f"Unsupported resource key type: {type(key)}")

comfy_extras/nodes_v3_test.py

@@ -1,5 +1,5 @@
 import torch
-from comfy_api.v3 import io, ui
+from comfy_api.v3 import io, ui, resources
 import logging
 import folder_paths
 import comfy.utils
@@ -143,7 +143,7 @@ class V3LoraLoader(io.ComfyNodeV3):
         if strength_model == 0 and strength_clip == 0:
             return io.NodeOutput(model, clip)
 
-        lora = cls.resources.get_torch_dict(io.ResourceKeyFolderFilename("loras", lora_name))
+        lora = cls.resources.get(resources.TorchDictFolderFilename("loras", lora_name))
 
         model_lora, clip_lora = comfy.sd.load_lora_for_models(model, clip, lora, strength_model, strength_clip)
         return io.NodeOutput(model_lora, clip_lora)