Jim Pivarski created ARROW-10930:
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Summary: In pyarrow, LargeListArray doesn't have a value_field
Key: ARROW-10930
URL: https://issues.apache.org/jira/browse/ARROW-10930
Project: Apache Arrow
Issue Type: Bug
Components: Python
Affects Versions: 2.0.0
Reporter: Jim Pivarski
This one is easy: it looks like the LargeListType is just missing this field.
Here it is for a 32-bit list (the reason I want this is to get at the
"nullable" field, although the "metadata" would be nice, too):
{code:java}
>>> import pyarrow as pa
>>> small_array = pa.ListArray.from_arrays(pa.array([0, 3, 3, 5]),
>>> pa.array([1.1, 2.2, 3.3, 4.4, 5.5]))
>>> small_array.type.value_field
pyarrow.Field<item: double>
>>> small_array.type.value_field.nullable
True{code}
Now with a large list:
{code:java}
>>> large_array = pa.LargeListArray.from_arrays(pa.array([0, 3, 3, 5]),
>>> pa.array([1.1, 2.2, 3.3, 4.4, 5.5]))
>>> large_array.type.value_field
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
AttributeError: 'pyarrow.lib.LargeListType' object has no attribute
'value_field'{code}
Verifying version:
{code:java}
>>> pa.__version__
'2.0.0'{code}
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