ModuleNotFoundError: No module named 'hnswlib' when running dyn.tl.cell_velocities(adata_hsc_raw)

[Jingle0814]

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Hi, Thank you to your team for developing dynamo, I encountered an error while running dynamo. I installed the latest version of dynamo(pip install git+https://github.com/aristoteleo/dynamo-release@master) and follow the Typical workflow in dyamo Tutorial: When I ran dyn.tl.cell_velocities(adata_hsc_raw) it turns :ModuleNotFoundError: No module named 'hnswlib'

By the way, previously I ran dynamo with version 1.3.2 it is normal. How do I solve it? Thanks a lot!

[Sichao25]

Thank you for reporting this issue. This seems to be a bug in the latest version of Dynamo. hnswlib is an awesome package we added recently for faster nearest neighbors calculation. I will set it to be an optional dependency to address the issue. Before that, you can just install hnswlib.

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