polars_python/lazyframe/
mod.rs

1mod exitable;
2#[cfg(feature = "pymethods")]
3mod general;
4mod optflags;
5#[cfg(feature = "pymethods")]
6mod serde;
7mod sink;
8pub mod visit;
9pub mod visitor;
10
11#[cfg(not(target_arch = "wasm32"))]
12pub use exitable::PyInProcessQuery;
13use parking_lot::RwLock;
14use polars::prelude::{Engine, LazyFrame, OptFlags};
15use pyo3::exceptions::PyValueError;
16use pyo3::prelude::*;
17use pyo3::pybacked::PyBackedStr;
18
19use crate::prelude::Wrap;
20
21#[pyclass(frozen)]
22#[repr(transparent)]
23pub struct PyLazyFrame {
24    pub ldf: RwLock<LazyFrame>,
25}
26
27impl Clone for PyLazyFrame {
28    fn clone(&self) -> Self {
29        Self {
30            ldf: RwLock::new(self.ldf.read().clone()),
31        }
32    }
33}
34
35impl From<LazyFrame> for PyLazyFrame {
36    fn from(ldf: LazyFrame) -> Self {
37        PyLazyFrame {
38            ldf: RwLock::new(ldf),
39        }
40    }
41}
42
43impl From<PyLazyFrame> for LazyFrame {
44    fn from(pldf: PyLazyFrame) -> Self {
45        pldf.ldf.into_inner()
46    }
47}
48
49#[pyclass(frozen)]
50#[repr(transparent)]
51pub struct PyOptFlags {
52    pub inner: RwLock<OptFlags>,
53}
54
55impl Clone for PyOptFlags {
56    fn clone(&self) -> Self {
57        Self {
58            inner: RwLock::new(*self.inner.read()),
59        }
60    }
61}
62
63impl From<OptFlags> for PyOptFlags {
64    fn from(inner: OptFlags) -> Self {
65        PyOptFlags {
66            inner: RwLock::new(inner),
67        }
68    }
69}
70
71impl<'a, 'py> FromPyObject<'a, 'py> for Wrap<Engine> {
72    type Error = PyErr;
73
74    fn extract(ob: Borrowed<'a, 'py, PyAny>) -> PyResult<Self> {
75        let parsed = ob
76            .extract::<PyBackedStr>()?
77            .parse()
78            .map_err(PyValueError::new_err)?;
79        Ok(Wrap(parsed))
80    }
81}
polars_python/lazyframe/mod.rs

polars_python/lazyframe/
mod.rs
