hijack method error with Python 3.12 / comfy_execution error

[Danamir]

I recently upgraded my ComfyUI Python installation to 3.12 / Torch 2.5, and have an error in the hijack method since :

** Python version: 3.12.7 (tags/v3.12.7:0b05ead, Oct  1 2024, 03:06:41) [MSC v.1941 64 bit (AMD64)]
pytorch version: 2.5.1+cu124

Traceback (most recent call last):
  File "F:\ComfyUI\nodes.py", line 2035, in load_custom_node
    module_spec.loader.exec_module(module)
  File "<frozen importlib._bootstrap_external>", line 995, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "F:\ComfyUI\custom_nodes\ComfyUI-0246\__init__.py", line 1, in <module>
    from .nodes import NODE_CLASS_MAPPINGS, NODE_DISPLAY_NAME_MAPPINGS
  File "F:\ComfyUI\custom_nodes\ComfyUI-0246\nodes.py", line 1092, in <module>
    lib0246.hijack(comfy_graph, "get_input_info", get_input_info_param_handle, get_input_info_res_handle)
  File "F:\ComfyUI\custom_nodes\ComfyUI-0246\utils.py", line 345, in hijack
    old_func = getattr(scope, name)
               ^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'get_input_info'

This seems to happen because the name func was not found in the scope. A simple fix is to handle the missing func case with a minor code modification :

old_func = getattr(scope, name, None)
if old_fund is None:
    return

With this modification the node loads correctly, but I did not test all of the functionalities with Python 3.12 .

Cheers,

[Trung0246]

Hm this looks more like comfy_execution folder is in unexpected place.

[Danamir]

I installed some time ago from a git clone. So the comfy_execution directory is directly at the root of the installation, same structure as the repository. It may be different with the portable installation, I'm not sure.