Exposing PyDataFrame from a rust library

[jmrgibson]

Describe your feature request

I have a rust application using polars & pyo3. All the data collection, processing, etc, is done in rust, but I want the ability to return a pl.DataFrame/PyDataFrame to the user for interactive work in a python terminal.

Unless I'm mistaken, it's not possible to create a PyDataFrame from rust, because py-polars isn't published to crates.io.

I realize I could probably do this by calling python code from rust, I would like to avoid having to have the user install polars (the python library) because we already distribute our rust app as a static binary with no external dependencies.

[ritchie46]

This works: https://github.com/pola-rs/polars/tree/master/examples/python_rust_compiled_function

[jg2562]

I believe this is a duplicate of #1325. I will also say that the example is not really ergonomic to use and fairly brittle to lib change.

[jmrgibson]

Closing as duplicate.