polars_core/utils/
series.rsuse std::rc::Rc;
use crate::prelude::*;
use crate::series::amortized_iter::AmortSeries;
pub fn with_unstable_series<F, T>(dtype: &DataType, f: F) -> T
where
F: Fn(&mut AmortSeries) -> T,
{
let container = Series::full_null(PlSmallStr::EMPTY, 0, dtype);
let mut us = AmortSeries::new(Rc::new(container));
f(&mut us)
}
pub fn handle_casting_failures(input: &Series, output: &Series) -> PolarsResult<()> {
let failure_mask = !input.is_null() & output.is_null();
let failures = input.filter(&failure_mask)?;
let additional_info = match (input.dtype(), output.dtype()) {
(DataType::String, DataType::Date | DataType::Datetime(_, _)) => {
"\n\nYou might want to try:\n\
- setting `strict=False` to set values that cannot be converted to `null`\n\
- using `str.strptime`, `str.to_date`, or `str.to_datetime` and providing a format string"
},
#[cfg(feature = "dtype-categorical")]
(DataType::String, DataType::Enum(_,_)) => {
"\n\nEnsure that all values in the input column are present in the categories of the enum datatype."
}
_ => "",
};
polars_bail!(
InvalidOperation:
"conversion from `{}` to `{}` failed in column '{}' for {} out of {} values: {}{}",
input.dtype(),
output.dtype(),
output.name(),
failures.len(),
input.len(),
failures.fmt_list(),
additional_info,
)
}