adamreeve opened a new issue, #43145: URL: https://github.com/apache/arrow/issues/43145
### Describe the bug, including details regarding any error messages, version, and platform. Reproduced using PyArrow 16.1.0 on Fedora 39 Linux. The null values are still displayed as null when printing, but if round tripped via Parquet they are lost: ```python import pyarrow as pa import pyarrow.parquet as pq schema = pa.schema([ pa.field("x", pa.int64(), nullable=False)]) table = pa.Table.from_pydict({ "x": [1, None, 3], }, schema=schema) print(f"Original table:\n{table}\n") pq.write_table(table, 'data.parquet') read = pq.read_table('data.parquet') print(f"Table from Parquet:\n{read}") ``` This outputs: ``` Original table: pyarrow.Table x: int64 not null ---- x: [[1,null,3]] Table from Parquet: pyarrow.Table x: int64 not null ---- x: [[1,0,3]] ``` Is this expected behaviour? I would have thought this should raise an exception when the table is created. ### Component(s) Python -- 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: issues-unsubscr...@arrow.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org