Module `pkg_resources` not found. Problems running examples.

[lennarteing]

Description:

I was trying to run the sam3_video_predictor_example.ipynb notebook and encountered this problem when import sam3 is called:

---------------------------------------------------------------------------
ModuleNotFoundError                       Traceback (most recent call last)
Cell In[10], line 2
      1 import os
----> 2 import sam3
      3 import torch
      5 sam3_root = os.path.join(os.path.dirname(sam3.__file__), "..")

File ~/sam3/sam3/__init__.py:5
      1 # Copyright (c) Meta Platforms, Inc. and affiliates. All Rights Reserved
      2 
      3 # pyre-unsafe
----> 5 from .model_builder import build_sam3_image_model
      7 __version__ = "0.1.0"
      9 __all__ = ["build_sam3_image_model"]

File ~/sam3/sam3/model_builder.py:8
      5 import os
      6 from typing import Optional
----> 8 import pkg_resources
      9 import torch
     10 import torch.nn as nn

ModuleNotFoundError: No module named 'pkg_resources'

Reproduction:

mamba create -n sam3 python=3.12
mamba deactivate
mamba activate sam3
python -m pip install torch==2.7.0 torchvision torchaudio --index-url https://download.pytorch.org/whl/cu126
git clone https://github.com/facebookresearch/sam3.git
cd sam3
pip install -e .
pip install -e ".[notebooks]"

Possible fix:

This problem could be fixed for me by pinning the setuptools package.

python -m pip install --force-reinstall "setuptools<82"

This did the trick for me.
This seems to happen because the pkg_resources package has been deprecated after setuptools==81.