feat(python): Implement DataFrame Interchange Protocol through pyarrow
#6581
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Follow-up of #5662
Resolves #2249
Utilizes
pyarrow's implementation of the DataFrame interchange protocol. Many thanks to @jorisvandenbossche and the pyarrow team for their work on this.Changes:
DataFrame.__dataframe__for converting to the interchange formatpl.from_dataframefor converting from the interchange formatLimitations:
pyarrow>=11.0.0is requiredNotImplementedError, indicating that we do not currently offer this, but are planning to in the future (either through better pyarrow integration, or utilizing our own implementation of the protocol).from_dataframein a zero-copy manner. This will throw aNotImplementedError. We can refine this later by detecting which dtypes are present in the dataframe and determining if those can be handled in a zero-copy manner.So while there are some (significant) limitations on zero-copy conversions, we can now support the dataframe interchange protocol!