[Bug]: demo9b warning message

[lee1043]

What happened?

/tmp/ipykernel_549/406417390.py:8: FutureWarning: The return type of `Dataset.dims` will be changed to return a set of dimension names in future, in order to be more consistent with `DataArray.dims`. To access a mapping from dimension names to lengths, please use `Dataset.sizes`.
  aspect=ds.dims["lon"] / ds.dims["lat"],  # for a sensible figsize

What did you expect to happen? Are there are possible answers you came across?

No response

Minimal Complete Verifiable Example (MVCE)

No response

Relevant log output

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Anything else we need to know?

No response

Environment

latest