AlenkaF commented on issue #37517:
URL: https://github.com/apache/arrow/issues/37517#issuecomment-1715356785
Sorry, I can not seem to create an example to reproduce the issue.
Tried with dev version of `pyarrow`:
```python
(pyarrow-dev) alenkafrim@Alenkas-MacBook-Pro python % python
Python 3.10.10 (main, Feb 16 2023, 02:46:59) [Clang 14.0.0
(clang-1400.0.29.202)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import pyarrow as pa
>>> pa.__version__
'14.0.0.dev42+g1af709ff9.d20230830'
>>> data = [[{'key': 'a', 'value': "1"}, {'key': 'b', 'value': "2"}],
[{'key': 'c', 'value': "3"}]]
>>> map_type = pa.map_(pa.string(), pa.string())
>>> inner_map = pa.array(data, type=map_type)
>>> inner_list = pa.ListArray.from_arrays([0, 1, 2], inner_map)
>>> array = pa.MapArray.from_arrays([0, 1, 2], ["First", "Second"],
inner_list)
>>> table = pa.table({'array_element': array})
>>> table.schema
array_element: map<string, list<item: map<string, string>>>
child 0, entries: struct<key: string not null, value: list<item:
map<string, string>>> not null
child 0, key: string not null
child 1, value: list<item: map<string, string>>
child 0, item: map<string, string>
child 0, entries: struct<key: string not null, value: string>
not null
child 0, key: string not null
child 1, value: string
>>> table.to_pandas()
array_element
0 [(First, [[('a', '1'), ('b', '2')]])]
1 [(Second, [[('c', '3')]])]
```
```python
>>> table = pa.table({'array_element': inner_list})
>>> table.schema
array_element: list<item: map<string, string>>
child 0, item: map<string, string>
child 0, entries: struct<key: string not null, value: string> not null
child 0, key: string not null
child 1, value: string
>>> table.to_pandas()
array_element
0 [[(a, 1), (b, 2)]]
1 [[(c, 3)]]
```
Can you check which column is giving you the error? Also, does the code
above work for you?
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