pola-rs/polars · error

data types of values should match

Error message

data types of values should match

What it means

Error "data types of values should match" thrown in pola-rs/polars.

Source

Thrown at crates/polars-core/src/series/any_value.rs:24

#[cfg(feature = "dtype-categorical")]
use crate::chunked_array::builder::CategoricalChunkedBuilder;
use crate::chunked_array::builder::{AnonymousOwnedListBuilder, get_list_builder};
use crate::prelude::*;
use crate::utils::any_values_to_supertype;

impl<'a, T: AsRef<[AnyValue<'a>]>> NamedFrom<T, [AnyValue<'a>]> for Series {
    /// Construct a new [`Series`] from a collection of [`AnyValue`].
    ///
    /// # Panics
    ///
    /// Panics if the values do not all share the same data type (with the exception
    /// of [`DataType::Null`], which is always allowed).
    ///
    /// [`AnyValue`]: crate::datatypes::AnyValue
    fn new(name: PlSmallStr, values: T) -> Self {
        let values = values.as_ref();
        Series::from_any_values(name, values, true).expect("data types of values should match")
    }
}

impl Series {
    /// Construct a new [`Series`] from a slice of AnyValues.
    ///
    /// The data type of the resulting Series is determined by the `values`
    /// and the `strict` parameter:
    /// - If `strict` is `true`, the data type is equal to the data type of the
    ///   first non-null value. If any other non-null values do not match this
    ///   data type, an error is raised. If the first non-null value is a
    ///   decimal the slice is scanned for the maximum precision and scale possible.
    /// - If `strict` is `false`, the data type is the supertype of the `values`.
    ///   An error is returned if no supertype can be determined.
    ///   **WARNING**: A full pass over the values is required to determine the supertype.
    /// - If no values were passed, the resulting data type is `Null`.
    pub fn from_any_values(
        name: PlSmallStr,

View on GitHub (pinned to df599052da)

When it happens

Trigger: Thrown at crates/polars-core/src/series/any_value.rs:24 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of pola-rs/polars@df599052da (2026-08-16). Data as JSON: /api/errors/490143273dc66ccf. Report an issue: GitHub.