Cannot call a function with named arguments

[pvcnt]

It looks like it is impossible to call a function with named arguments. While g(1) works well, g(x=1) results in an error.

How to reproduce

Given the following snippet:

import starlark as sl

glb = sl.Globals.standard()
mod = sl.Module()


def g(x):
    print(f"g called with {x}")
    return 2 * x


mod.add_callable("g", g)

ast = sl.parse("a.star", "g(x=1)")


def load(name):
    raise FileNotFoundError(name)


sl.eval(mod, ast, glb, sl.FileLoader(load))

I obtain the following error:

error: Found `x` extra named parameter(s) for call to function

[inducer]

Yep, not currently implemented:

starlark-pyo3/src/lib.rs

Lines 622 to 641 in 00f5fe7

	impl<'v> StarlarkValue<'v> for PythonCallableValue {
	fn invoke(
	&self,
	_me: Value<'v>,
	args: &Arguments<'v, '_>,
	eval: &mut starlark::eval::Evaluator<'v, '_>,
	) -> anyhow::Result<Value<'v>> {
	Python::with_gil(|py| -> anyhow::Result<Value<'v>> {
	args.no_named_args()?;
	let py_args: Vec<PyObject> = (args
	.positions(eval.heap())?
	.map(|v| -> PyResult<PyObject> { value_to_pyobject(v) }))
	.collect::<PyResult<Vec<PyObject>>>()?;
	convert_to_anyhow(pyobject_to_value(
	self.callable.call1(py, PyTuple::new_bound(py, py_args))?,
	eval.heap(),
	))
	})
	}
	}

Help welcome.