fallintoplace opened a new pull request, #3707:
URL: https://github.com/apache/iceberg-python/pull/3707

   # Rationale for this change
   
   The `snapshots` metadata table declares `operation` as nullable because 
snapshots without a summary do not have an operation. However, 
`InspectTable.snapshots()` converted the missing value with `str(None)`, 
returning the literal string `"None"` instead of a null value.
   
   This change passes the operation directly to PyArrow, preserving null 
semantics and matching Apache Iceberg Java's snapshots metadata table.
   
   ## Are these changes tested?
   
   Yes. A regression test creates a snapshot without a summary and verifies 
that `table.inspect.snapshots()` returns a null operation.
   
   The following checks pass locally:
   
   - `PYTHONPATH=. uv run pytest tests/table/test_inspect.py -q` (5 passed)
   - `PYTHONPATH=. uv run --extra datafusion --extra pyiceberg-core pytest 
tests/table -q` (328 passed)
   - `make lint`
   
   ## Are there any user-facing changes?
   
   Yes. For snapshots without a summary, `table.inspect.snapshots()` now 
returns null in the `operation` column instead of the string `"None"`. There 
are no API changes.
   


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