krishan711 opened a new pull request, #4129:
URL: https://github.com/apache/iceberg-python/pull/4129

   # Rationale for this change
   
   `ArrowProjectionVisitor.list` rebuilds a list of structs with 
`LargeListArray.from_arrays(list_array.offsets, value_array)`. That drops the 
validity mask, so a null list is written as an empty list. This is the list 
version of #4118, which fixed the same thing for maps.
   
   The fix passes `mask=list_array.is_null()`.
   
   # Are these changes tested?
   
   Yes. `test__to_requested_schema_null_list_of_structs` covers a full batch 
and a sliced one. It fails without the fix.
   
   # Are there any user-facing changes?
   
   Null lists of structs stay null on write instead of becoming `[]`.
   
   🤖 Generated with [Claude Code](https://claude.com/claude-code)


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