kylebarron commented on code in PR #9439:
URL: https://github.com/apache/arrow-rs/pull/9439#discussion_r2955401196
##########
arrow-pyarrow/src/lib.rs:
##########
@@ -606,21 +595,52 @@ impl FromPyArrow for Table {
/// Convert a [`Table`] into `pyarrow.Table`.
impl IntoPyArrow for Table {
fn into_pyarrow(self, py: Python) -> PyResult<Bound<PyAny>> {
- let module = py.import(intern!(py, "pyarrow"))?;
- let class = module.getattr(intern!(py, "Table"))?;
-
let py_batches = PyList::new(py,
self.record_batches.into_iter().map(PyArrowType))?;
let py_schema = PyArrowType(Arc::unwrap_or_clone(self.schema));
let kwargs = PyDict::new(py);
kwargs.set_item("schema", py_schema)?;
- let reader = class.call_method("from_batches", (py_batches,),
Some(&kwargs))?;
+ let reader = table_class(py)?.call_method("from_batches",
(py_batches,), Some(&kwargs))?;
Ok(reader)
}
}
+fn array_class(py: Python<'_>) -> PyResult<&Bound<'_, PyType>> {
+ static TYPE: PyOnceLock<Py<PyType>> = PyOnceLock::new();
+ TYPE.import(py, "pyarrow", "Array")
Review Comment:
I see; so it's just saving two lookups into the CPython HashMap? I guess
that's not nothing, but it's not the slow module reinitialization I was worried
it was.
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