polars_core/frame/
from.rs

1use crate::prelude::*;
2
3impl TryFrom<StructArray> for DataFrame {
4    type Error = PolarsError;
5
6    fn try_from(arr: StructArray) -> PolarsResult<Self> {
7        let (fld, _length, arrs, nulls) = arr.into_data();
8        polars_ensure!(
9            nulls.is_none(),
10            ComputeError: "cannot deserialize struct with nulls into a DataFrame"
11        );
12        let columns = fld
13            .iter()
14            .zip(arrs)
15            .map(|(fld, arr)| {
16                // SAFETY:
17                // reported data type is correct
18                unsafe {
19                    Series::_try_from_arrow_unchecked_with_md(
20                        fld.name.clone(),
21                        vec![arr],
22                        fld.dtype(),
23                        fld.metadata.as_deref(),
24                    )
25                }
26                .map(Column::from)
27            })
28            .collect::<PolarsResult<Vec<_>>>()?;
29        DataFrame::new(columns)
30    }
31}
polars_core/frame/from.rs

polars_core/frame/
from.rs
