Remove pytorch_lightning dependency.

comfy/checkpoint_pickle.py

+import pickle
+
+load = pickle.load
+
+class Empty:
+    pass
+
+class Unpickler(pickle.Unpickler):
+    def find_class(self, module, name):
+        #TODO: safe unpickle
+        if module.startswith("pytorch_lightning"):
+            return Empty
+        return super().find_class(module, name)

comfy/utils.py

 import torch
 import math
 import struct
+import comfy.checkpoint_pickle
 
 def load_torch_file(ckpt, safe_load=False):
     if ckpt.lower().endswith(".safetensors"):
@@ -14,7 +15,7 @@ def load_torch_file(ckpt, safe_load=False):
         if safe_load:
             pl_sd = torch.load(ckpt, map_location="cpu", weights_only=True)
         else:
-            pl_sd = torch.load(ckpt, map_location="cpu")
+            pl_sd = torch.load(ckpt, map_location="cpu", pickle_module=comfy.checkpoint_pickle)
         if "global_step" in pl_sd:
             print(f"Global Step: {pl_sd['global_step']}")
         if "state_dict" in pl_sd:

requirements.txt

@@ -4,7 +4,6 @@ torchsde
 einops
 transformers>=4.25.1
 safetensors>=0.3.0
-pytorch_lightning
 aiohttp
 accelerate
 pyyaml