arrow/tests/pyarrow.rs

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// to you under the Apache License, Version 2.0 (the
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//
//   http://www.apache.org/licenses/LICENSE-2.0
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use arrow::array::{ArrayRef, Int32Array, StringArray};
use arrow::pyarrow::{FromPyArrow, ToPyArrow};
use arrow::record_batch::RecordBatch;
use pyo3::Python;
use std::sync::Arc;

#[test]
fn test_to_pyarrow() {
    pyo3::prepare_freethreaded_python();

    let a: ArrayRef = Arc::new(Int32Array::from(vec![1, 2]));
    let b: ArrayRef = Arc::new(StringArray::from(vec!["a", "b"]));
    let input = RecordBatch::try_from_iter(vec![("a", a), ("b", b)]).unwrap();
    println!("input: {:?}", input);

    let res = Python::with_gil(|py| {
        let py_input = input.to_pyarrow(py)?;
        let records = RecordBatch::from_pyarrow(py_input.as_ref(py))?;
        let py_records = records.to_pyarrow(py)?;
        RecordBatch::from_pyarrow(py_records.as_ref(py))
    })
    .unwrap();

    assert_eq!(input, res);
}