Error occurred when running the code of GCN from the tutorial

Questions
#1

I am a beginner to pytorch and DGL, and can anybody give any comments about the problem？

The code is downloaded from the tutorial website: https://docs.dgl.ai/tutorials/models/1_gnn/1_gcn.html

Traceback (most recent call last):
File “/home/hzhaoaf/anaconda2/envs/py35/lib/python3.5/site-packages/dgl/graph_index.py”, line 922, in create_graph_index
gi.from_networkx(graph_data)
File “/home/hzhaoaf/anaconda2/envs/py35/lib/python3.5/site-packages/dgl/graph_index.py”, line 660, in from_networkx
for e in nx_graph.edges:
TypeError: ‘method’ object is not iterable

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File “1_gcn.py”, line 116, in
g, features, labels, mask = load_cora_data()
File “1_gcn.py”, line 108, in load_cora_data
g = DGLGraph(data.graph)
File “/home/hzhaoaf/anaconda2/envs/py35/lib/python3.5/site-packages/dgl/graph.py”, line 181, in init
self._graph = create_graph_index(graph_data, multigraph, readonly)
File “/home/hzhaoaf/anaconda2/envs/py35/lib/python3.5/site-packages/dgl/graph_index.py”, line 925, in create_graph_index
% type(graph_data))
dgl._ffi.base.DGLError: Error while creating graph from input of type “<class ‘networkx.classes.digraph.DiGraph’>”.

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#2

Hi,

Which version of networkx are you using?

You can get the version by this:

import networkx
print(networkx.__version__)

#3

The version of NetworkX is 1.11

Python 3.5.3 |Anaconda custom (64-bit)| (default, Mar 6 2017, 11:58:13)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-1)] on linux
Type “help”, “copyright”, “credits” or “license” for more information.
>>> import networkx
>>> networkx.version
‘1.11’
>>>

#4

It seems your networkx version is too old.
Update it by using

conda update networkx

or

pip install --upgrade networkx

And after this, the new version is expected to be 2.2.

#5

The problem is fixed after updating the networkX. Thanks very much.

However, another problem occurred in weakref.py. Can you also give any suggestions?

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image721×267 40 KB

#6

Hi, there seems to be many related problems and solutions on the internet like this. See if some of the solutions people propose can solve your issue.

#7

It seems a python bug. Upgrade python may fix this.

#8

Thank you very much. I will check it.

#9

Thank for your help very much. There are no problems when I run the gcn in the directory “examples/pytorch” in the project. I will fix it later.