How to return Vec<PyAny> from python list?

[AnatolyBuga]

My python function needs to return a list of objects, each of which cannot be easily converted to rust objects. This script does the conversion. It's done in the function with signature:

pub fn py_series_to_rust_series(series: &PyAny) -> PyResult<Series>

ie the function converts PyAny into the object I need which is polars::Series.

My python function however has to return a list of such objects (a list of python Series):

import polars as pl

def add1 ():
    data = {"a": [1, 2], "b": [3, 4]}
    df = pl.DataFrame(data)
    return df.get_columns() 

My question is, since the returned object is python list, I want something like:

let r: Vec<PyAny> = app.call0(py)?.extract(py)?;

What is the right way to do it? ie How do I turn the returned value into Vec (or anything which implements iter) so that I can use py_series_to_rust_series to convert this object into Vec?

[davidhewitt]

Try

let r: Vec<Py<PyAny>> = app.call0(py)?.extract(py)?;

[AnatolyBuga]

Thanks alot @davidhewitt , don't know how I missed that!