Enum ExternalCompression 

pub enum ExternalCompression {
    Uncompressed,
    Gzip {
        level: Option<u32>,
    },
    Zstd {
        level: Option<u32>,
    },
}

Available on crate feature polars-io only.

Compression options for file that are expressed externally like CSV and NDJSON. Externally does not mean by an external tool, more that it doesn’t happen internally like it does for Parquet and IPC.

Compared to other formats like IPC and Parquet, compression is external.

Variants

Uncompressed

Gzip

Fields

level: Option<u32>

Zstd

Fields

level: Option<u32>

Implementations

impl ExternalCompression

pub fn file_suffix(self) -> Option<&'static str>

Returns the expected file suffix associated with the compression format.

pub fn try_from( value: &str, level: Option<u32>, ) -> Result<ExternalCompression, PolarsError>

Trait Implementations

impl Clone for ExternalCompression

fn clone(&self) -> ExternalCompression

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExternalCompression

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

Formats the value using the given formatter.

impl Default for ExternalCompression

fn default() -> ExternalCompression

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ExternalCompression

fn deserialize<__D>( __deserializer: __D, ) -> Result<ExternalCompression, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ExternalCompression

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, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for ExternalCompression

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for ExternalCompression

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for ExternalCompression

impl Eq for ExternalCompression

impl StructuralPartialEq for ExternalCompression