edgarrmondragon opened a new pull request, #998:
URL: https://github.com/apache/arrow-nanoarrow/pull/998
Adds support for iterating map arrays:
```python
# mre_map.py
# /// script
# requires-python = ">=3.10"
# dependencies = [
# "nanoarrow",
# "pyarrow",
# ]
# ///
"""Iterating a map array with nanoarrow fails."""
import nanoarrow as na
import pyarrow as pa
array = pa.array(
[[("a", 1), ("b", None)], [], None, [("c", 3)]],
type=pa.map_(pa.string(), pa.int64()),
)
print(f"nanoarrow {na.__version__}, pyarrow {pa.__version__}")
print(na.Array(array).to_pylist())
```
Run it with `uv run --no-project mre_map.py`. The output is:
```
nanoarrow 0.9.0, pyarrow 26.0.0
...
File ".../nanoarrow/iterator.py", line 231, in _iter_chunk
raise KeyError(
f"Can't resolve iterator for type '{self._schema_view.type}'"
)
KeyError: "Can't resolve iterator for type 'map'"
```
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