Release GIL to prevent deadlock with GIL-releasing in ObjectValue::cl…

…one().

crates/polars-python/src/dataframe/general.rs

@@ -262,16 +262,16 @@ impl PyDataFrame {
         Ok(PyDataFrame::new(df))
     }
 
-    pub fn gather(&self, indices: Wrap<Vec<IdxSize>>) -> PyResult<Self> {
+    pub fn gather(&self, py: Python, indices: Wrap<Vec<IdxSize>>) -> PyResult<Self> {
         let indices = indices.0;
         let indices = IdxCa::from_vec("".into(), indices);
-        let df = self.df.take(&indices).map_err(PyPolarsErr::from)?;
+        let df = Python::allow_threads(py, || self.df.take(&indices).map_err(PyPolarsErr::from))?;
         Ok(PyDataFrame::new(df))
     }
 
-    pub fn gather_with_series(&self, indices: &PySeries) -> PyResult<Self> {
+    pub fn gather_with_series(&self, py: Python, indices: &PySeries) -> PyResult<Self> {
         let indices = indices.series.idx().map_err(PyPolarsErr::from)?;
-        let df = self.df.take(indices).map_err(PyPolarsErr::from)?;
+        let df = Python::allow_threads(py, || self.df.take(indices).map_err(PyPolarsErr::from))?;
         Ok(PyDataFrame::new(df))
     }