dgl.copy_edge deprecated

[benjileibo]

change to dgl.copy_e() https://docs.dgl.ai/en/0.8.x/generated/dgl.function.copy_edge.html#

[Heisenburger2020]

change to dgl.copy_e() https://docs.dgl.ai/en/0.8.x/generated/dgl.function.copy_edge.html#

Thank you for your advice on this problem.

By the way, have you met the nan problem?
complex_names where Nan encountered

I suspect this results from the data process part, because a lot of warnings has been reported like "rdkit coords could not be generated without using random coords. using random coords now". I do not know how to solve it.

[Heisenburger2020]

Is there anything I can do to avoid this nan error? Thank you !