Struct NpzWriter 

pub struct NpzWriter {
    pub files: Vec<(String, Vec<u8>)>,
}

Writer for the simplified .npz container format.

Each array is stored as a raw .npy blob. The container layout is:

[count: u32 LE]
foreach:
  [name_len: u32 LE][name UTF-8 bytes]
  [npy_len: u32 LE][npy bytes]

Fields

files: Vec<(String, Vec<u8>)>

Stored (name, npy_bytes) pairs.

Implementations

impl NpzWriter

pub fn new() -> Self

Create an empty NpzWriter.

pub fn add_array_f64(&mut self, name: &str, shape: &[usize], data: &[f64])

Append a f64 array under name.

pub fn add_array_f32(&mut self, name: &str, shape: &[usize], data: &[f32])

Append an f32 array under name.

pub fn add_array_i32(&mut self, name: &str, shape: &[usize], data: &[i32])

Append an i32 array under name.

pub fn add_array_i64(&mut self, name: &str, shape: &[usize], data: &[i64])

Append an i64 array under name.

pub fn len(&self) -> usize

Number of arrays stored.

pub fn is_empty(&self) -> bool

Whether the archive is empty.

pub fn names(&self) -> Vec<&str>

List all array names.

pub fn contains(&self, name: &str) -> bool

Check if an array with the given name exists.

pub fn remove(&mut self, name: &str) -> bool

Remove an array by name. Returns true if found and removed.

pub fn to_bytes(&self) -> Vec<u8>

Serialize all stored arrays to bytes.

pub fn from_bytes(data: &[u8]) -> Result<Self, String>

Deserialize from bytes produced by NpzWriter::to_bytes.

pub fn get_f64( &self, name: &str, ) -> Option<Result<(Vec<usize>, Vec<f64>), String>>

Retrieve a f64 array by name, returning (shape, data).

pub fn get_f32( &self, name: &str, ) -> Option<Result<(Vec<usize>, Vec<f32>), String>>

Retrieve an f32 array by name, returning (shape, data).

pub fn get_i32( &self, name: &str, ) -> Option<Result<(Vec<usize>, Vec<i32>), String>>

Retrieve an i32 array by name, returning (shape, data).

pub fn get_i64( &self, name: &str, ) -> Option<Result<(Vec<usize>, Vec<i64>), String>>

Retrieve an i64 array by name, returning (shape, data).

Trait Implementations

impl Clone for NpzWriter

fn clone(&self) -> NpzWriter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NpzWriter

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

Formats the value using the given formatter.

impl Default for NpzWriter

fn default() -> Self

Returns the “default value” for a type.