Tpt opened a new issue, #9438:
URL: https://github.com/apache/arrow-rs/issues/9438

   Currently the Python bindings import the `pyarrow` module each time a 
conversion is done. It is possible to  cache retrieved types to avoid this. The 
[pyO3 
`PyOnceLock::import`](https://docs.rs/pyo3/latest/pyo3/sync/struct.PyOnceLock.html#method.import)
 method provides an easy way to do it.


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