'NeighborSampler' requires either 'pyg-lib' or 'torch-sparse'

[Rexedoziem]

import torch_sparse
import torch_scatter
from torch_geometric.loader import NeighborLoader

train_loader = NeighborLoader(
combined_data,
num_neighbors=[10,10],
batch_size=32,
shuffle=True,
input_nodes=('user', combined_data['user'].train_mask),
)

Iterate over the train_loader and check for errors

for i, subgraph in enumerate(train_loader):
print(f"Processing subgraph {i}")

After running the code, i had this error 'NeighborSampler' requires either 'pyg-lib' or 'torch-sparse'.
i am running it on windows 11pro using kaggle notebook for my analysis, i don't know where the problem is coming from as i've installed all necessary packages required?.

[akihironitta]

It looks like PyG can find niether pyg-lib nor torch-sparse. Can you share the output of python -m pip list? If you don't see them, you might want to try installing them again.

[Muyiiiii]

Just install pyg cluster sparse and so on before the torch_geometric .

[karthiksoman]

If you're still searching for a solution, here’s what worked for me:

conda create -n pyg_env python=3.12
conda activate pyg_env
pip install --no-binary=torch-sparse torch-sparse
pip install --no-binary=torch-scatter torch-scatter
pip install torch torchvision torchaudio
pip install torch-geometric

[Muyiiiii]

Good answer, I just don't know how to use pip install torch-sparse. I always install from wheel on this website https://pytorch-geometric.com/whl/

[Srivathsan-Srinivas]

I had the same problem and it was fixed by doing the following in my mac:

1. Make sure /Library/Frameworks/Python.framework/ is present with Versions subdirectory pointing to your preferred version.

(ve_3.10.13) Sri@Harnis-MacBook-Pro trial_4 % ls -l /Library/Frameworks/Python.framework/Versions 
total 0
drwxrwxr-x  11 root  admin  352 Nov  6 12:51 3.10
drwxrwxr-x  11 root  admin  352 Nov  5 15:45 3.11
lrwxr-xr-x   1 root  wheel    4 Nov  6 12:51 Current -> 3.10
(ve_3.10.13) Sri@Harnis-MacBook-Pro trial_4 % 

If, for any reason, you do not have the directory Python.framework (I did not have it a few days back), I installed python by downloading an installer from Python.org. brew install python did not create any subdir in Frameworks....for some reason.

2. For me, having torch version 2.4.0 combined with Python 3.10.x worked.
   pip3 install torch==2.4.0.
3. Then, you can execute pip install torch-geometric torch-sparse torch-scatter torch-cluster torch-spline-conv pyg-lib -f https://data.pyg.org/whl/torch-2.4.0+cpu.html

note: do all the above in your preferred virtual-env (of 3.10.x).