from torch_geometric.datasets import KarateClub
this gives me the error
OSError: /usr/local/lib/python3.7/dist-packages/torch_sparse/_convert_cpu.so: undefined symbol: _ZN6caffe28TypeMeta21_typeMetaDataInstanceIN3c107complexIfEEEEPKNS_6detail12TypeMetaDataEv

I am running on colab.