Struct polars::datatypes::Schema

pub struct Schema { /* fields omitted */ }

Implementations

impl Schema

pub fn rename<I, J, T, S>(
    &self,
    old_names: I,
    new_names: J
) -> Result<Schema, PolarsError> where
    T: AsRef<str>,
    S: AsRef<str>,
    I: IntoIterator<Item = T>,
    J: IntoIterator<Item = S>, 

pub fn new(fields: Vec<Field, Global>) -> Schema

pub fn len(&self) -> usize

pub fn is_empty(&self) -> bool

pub fn fields(&self) -> &Vec<Field, Global>

Returns an immutable reference of the vector of Field instances

pub fn field(&self, i: usize) -> Option<&Field>

Returns an immutable reference of a specific Field instance selected using an offset within the internal fields vector

pub fn field_with_name(&self, name: &str) -> Result<&Field, PolarsError>

Returns an immutable reference of a specific Field instance selected by name

pub fn index_of(&self, name: &str) -> Result<usize, PolarsError>

Find the index of the column with the given name

pub fn to_arrow(&self) -> Schema

pub fn try_merge(schemas: &[Schema]) -> Result<Schema, PolarsError>

pub fn column_with_name(&self, name: &str) -> Option<(usize, &Field)>

Trait Implementations

impl Clone for Schema

pub fn clone(&self) -> Schema

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Schema

pub fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for Schema

pub fn default() -> Schema

Returns the “default value” for a type.

impl<'_> From<&'_ Schema> for Schema

pub fn from(a_schema: &Schema) -> Schema

Performs the conversion.

impl From<Schema> for Schema

pub fn from(a_schema: Schema) -> Schema

Performs the conversion.

impl Hash for Schema

pub fn hash<__H>(&self, state: &mut __H) where
    __H: Hasher, 

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H) where
    H: Hasher, 

Feeds a slice of this type into the given Hasher.

impl PartialEq<Schema> for Schema

pub fn eq(&self, other: &Schema) -> bool

This method tests for self and other values to be equal, and is used by ==.

pub fn ne(&self, other: &Schema) -> bool

This method tests for !=.

impl StructuralPartialEq for Schema