[Python] DataFrame Interchange Protocol

[AlenkaF]

Describe the enhancement requested

This is an umbrella issue for all tasks connected to the Dataframe Interchange Protocol.
https://data-apis.org/dataframe-protocol/latest/index.html

• [Python] DataFrame Interchange Protocol for pyarrow Table #33346
• [Python] DataFrame Interchange Protocol for pyarrow.RecordBatch #33926
• [Docs][Python] Document DataFrame Interchange Protocol implementation and usage #33980
• [C++][Python] Implementation of the dlpack #33984
• Implement DataFrame Interchange Protocol Compliance Suite Arrow support data-apis/dataframe-interchange-tests#21

Component(s)

Python

[stinodego]

I noticed that there is currently no support yet in the from_dataframe function for boolean columns with bitsize 1. Is there an issue for implementing this?

import polars as pl
import pyarrow as pa
import pyarrow.interchange

df = pl.Series("a", [True, False], dtype=pl.Boolean).to_frame()
dfi = df.__dataframe__()
pa.interchange.from_dataframe(dfi)
# NotImplementedError: Conversion for (<DtypeKind.BOOL: 20>, 1, 'b', '=') is not yet supported.

[AlenkaF]

No, there is no issue - I think we missed it as we didn't have the use case then.
Will open a new issue to implement it, thanks!

[AlenkaF]

Closing this issue as all tasks are done.