Arttii commented on issue #12667:
URL: https://github.com/apache/arrow/issues/12667#issuecomment-1072673994
Running this:
```
pyarrow.__version__
df = pd.DataFrame({"a": [1, 2, 3]})
table = pyarrow.Table.from_pandas(df)
userdata_parquet_dataset= pyarrow.dataset.dataset(table)
batches=[r for r in userdata_parquet_dataset.to_batches()]
reader=pyarrow.dataset.Scanner.from_batches(batches,userdata_parquet_dataset.schema).to_reader()
dataset=pyarrow.dataset.dataset(reader)
```
gets me this:
```
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
Input In [15], in <cell line: 7>()
5 batches=[r for r in userdata_parquet_dataset.to_batches()]
6
reader=pyarrow.dataset.Scanner.from_batches(batches,userdata_parquet_dataset.schema).to_reader()
----> 7 dataset=pyarrow.dataset.dataset(reader)
File
~/workdir/duckdb/.venv/lib/python3.9/site-packages/pyarrow/dataset.py:687, in
dataset(source, schema, format, filesystem, partitioning, partition_base_dir,
exclude_invalid_files, ignore_prefixes)
685 return _in_memory_dataset(source, **kwargs)
686 else:
--> 687 raise TypeError(
688 'Expected a path-like, list of path-likes or a list of
Datasets '
689 'instead of the given type: {}'.format(type(source).__name__)
690 )
TypeError: Expected a path-like, list of path-likes or a list of Datasets
instead of the given type: RecordBatchReader
```
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