Dataframe converter #9
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Warning: this is an untested sketch! This change provides a few humble functions to try to adapt the Xarray model to Dask's dataframe model. The conversion is more or less an itertools.product and index operation. The translation to dataframes honor's Xarray's chunks. I've copied weather-tools' `ichunked` function just in case we need that layer of chunking of iterables (it's not used now). There area a few next steps. From here, we can write unit tests to prove out the conversion to Dask Dataframe. Further, we can then add dask-sql to this module and see how it works on real SQL queries. I'm pretty sure before applying `unravel` to `form_map`, we'll need to convert the output to a Pandas dataframe.
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CC: @mahrsee1997 -- Feel free to contribute to this branch if this is interesting to you! |
It lacks support for dataframe features. Nor is it performant. But at a base level, we can convert Xarray datasets to dataframes.
1. Compute slices late 2. Adding `divisions` metadata (via an integer index).
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This change provides a few humble functions to try to adapt the Xarray model to Dask's dataframe model. The conversion is more or less an itertools.product and index operation. The translation to dataframes honor's Xarray's chunks.
There area a few next steps. From here, we can add dask-sql to this module and see how it works on real SQL queries.