AlenkaF commented on issue #34574: URL: https://github.com/apache/arrow/issues/34574#issuecomment-1477545794
If I am reading the C++ code correctly, this is the current design in the conversion of the lists https://github.com/apache/arrow/blob/69118b2d26f2fbbbe65ad30dbe167d74b70fe791/python/pyarrow/src/arrow/python/arrow_to_pandas.cc#L735-L770 We do, however, store the `pandas_dtype` in schema metadata: ```python >>> table = pa.Table.from_pandas(df) >>> table.schema.metadata {b'pandas': b'{"index_columns": [{"kind": "range", "name": null, "start": 0, "stop": 1, "step": 1}], "column_indexes": [{"name": null, "field_name": null, "pandas_type": "unicode", "numpy_type": "object", "metadata": {"encoding": "UTF-8"}}], "columns": [{"name": "a", "field_name": "a", "pandas_type": "list[int64]", ... ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
