"OGB" OSError: [WinError 127] 找不到指定的程序。

• • 1.[遇到这类问题往往跟torch安装的工具包（如torch-sparse,torch-scatter,torch-cluster）版本没对应上有关](https://blog.csdn.net/weixin_42358688/article/details/117433691)
• 2.[OGB使用环境安装与依赖](https://ogb.stanford.edu/docs/home/)
• • Data Loaders
• 3.[torch-geometric 环境安装->（点击即官网链接）](https://pytorch-geometric.com/whl/)
• • 安装torch-geometric 四件套
  • • 指定网址安装
    • 离线下载whl,本地安装
  • 降格使用
  • • 卸载当前冲突包
    • 安装其他版本
  • 测试

1.遇到这类问题往往跟torch安装的工具包（如torch-sparse,torch-scatter,torch-cluster）版本没对应上有关

• 2.OGB使用环境安装与依赖

• You can install OGB using Python package manager pip.

pip install ogb

Please check the version is 1.3.1.

python -c "import ogb; print(ogb.__version__)"
# Otherwise, please update the version by running
pip install -U ogb

• Requirements

• Data Loaders

from ogb.graphproppred import PygGraphPropPredDataset
from torch_geometric.data import DataLoader

# Download and process data at './dataset/ogbg_molhiv/'
dataset = PygGraphPropPredDataset(name = "ogbg-molhiv", root = 'dataset/')

 
split_idx = dataset.get_idx_split() 
train_loader = DataLoader(dataset[split_idx["train"]], batch_size=32, shuffle=True)
valid_loader = DataLoader(dataset[split_idx["valid"]], batch_size=32, shuffle=False)
test_loader = DataLoader(dataset[split_idx["test"]], batch_size=32, shuffle=False)

3.torch-geometric 环境安装->（点击即官网链接）

如果装的是cu10.0，只能用torch1.4之前的低版本了。torch版本太高了会报错

• 查询torch里面用的cuda版本

nvcc --version	

python -c 'import torch; print(torch.__version__)'
python -c 'import torch; print(torch.version.cuda)'

• 安装torch-geometric 四件套

pip install torch-sparse
pip install torch-scatter
pip install torch-cluster
pip install torch-geometric
pip install torch-spline-conv(optional)

指定网址安装

pip install torch-scatter -f https://pytorch-geometric.com/whl/torch-1.4.0+cu100.html
pip install torch-sparse -f https://pytorch-geometric.com/whl/torch-1.4.0+cu100.html
pip install torch-cluster -f https://pytorch-geometric.com/whl/torch-1.4.0+cu100.html
pip install torch-geometric

离线下载whl,本地安装

wget https://xxx.whl

wget https://pytorch-geometric.com/whl/torch-1.4.0+cu100/torch_cluster-1.5.4-cp37-cp37m-linux_x86_64.whl
wget https://pytorch-geometric.com/whl/torch-1.4.0+cu100/torch_scatter-2.0.4-cp37-cp37m-linux_x86_64.whl
wget https://pytorch-geometric.com/whl/torch-1.4.0+cu100/torch_sparse-0.6.1-cp37-cp37m-linux_x86_64.whl

pip install <whl-name>.whl
pip install torch-geometric

降格使用

卸载当前冲突包

pip uninstall torch-scatter
pip uninstall torch-sparse
pip uninstall torch-cluster
pip uninstall torch-spline-conv
pip uninstall torch-geometric

安装其他版本

跑geometric的开源项目，经常离不开ogb数据包。截止21.04最新的ogb包是1.3.1版本的。

• 测试

python -c "import torch_geometric"

如果没报错，就成功了。