TypeError: new(): invalid data type 'str', when converting graph from networkX

[euerka]

Hi,
May I seek for your advice regarding to following issue:

> TypeError                                 Traceback (most recent call last)
> <ipython-input-15-9288e5111e7b> in <module>
>      10 print(data)
>      11 G = to_networkx(data, node_attrs=['x'], edge_attrs=['edge_attr'])
> ---> 12 data = from_networkx(G)
>      13 print(data)
> 
> /workspace/conda-env/lib/python3.8/site-packages/torch_geometric/utils/convert.py in from_networkx(G, group_node_attrs, group_edge_attrs)
>     190         else:
>     191             try:
> --> 192                 data[key] = torch.tensor(value)
>     193             except ValueError:
>     194                 pass
> 
> TypeError: new(): invalid data type 'str'

when the below code is run:

import torch
from torch_geometric.data import Data
from torch_geometric.utils import erdos_renyi_graph, to_networkx, from_networkx

edge_index = erdos_renyi_graph(50, edge_prob=0.2)
x = torch.randn(50, 64)
edge_attr = torch.randn(edge_index.size(1), 32)
data = Data(edge_index=edge_index, x=x, edge_attr=edge_attr)

print(data)
G = to_networkx(data, node_attrs=['x'], edge_attrs=['edge_attr'])
data = from_networkx(G)
print(data)

There is no such kind of issue when the code run in another OS system.

Thanks!

[rusty1s]

Which PyG/PyTorch version are you using? I don't get an error when running this. I still pushed a potential fix in #5876.

[euerka]

The issue occurred when the version is PyG 2.1.0 with PyTorch 1.12.1.
There is no such issue when I downgrade the version to PyG 2.0.4 with PyTorch 1.11.0.

[rusty1s]

Thanks for confirming. Looks like PyTorch 1.12.1 throws a different error if types do not match. This should indeed be fixed by #5876.