Struct BertPooler

pub struct BertPooler { /* private fields */ }

BERT Pooler

Pooler used in BERT models. It is made of a fully connected layer which is applied to the first sequence element.

Implementations

impl BertPooler

pub fn new<'p, P>(p: P, config: &BertConfig) -> BertPooler

where P: Borrow<Path<'p>>,

Build a new BertPooler

Arguments

• p - Variable store path for the root of the BERT model
• config - BertConfig object defining the model architecture

Example

use rust_bert::bert::{BertConfig, BertPooler};
use rust_bert::Config;
use std::path::Path;
use tch::{nn, Device};

let config_path = Path::new("path/to/config.json");
let device = Device::Cpu;
let p = nn::VarStore::new(device);
let config = BertConfig::from_file(config_path);
let pooler: BertPooler = BertPooler::new(&p.root(), &config);

pub fn forward(&self, hidden_states: &Tensor) -> Tensor

Forward pass through the pooler

Arguments

• hidden_states - input tensor of shape (batch size, sequence_length, hidden_size).

Returns

• Tensor of shape (batch size, hidden_size)

Example

let pooler: BertPooler = BertPooler::new(&vs.root(), &config);
let (batch_size, sequence_length, hidden_size) = (64, 128, 512);
let input_tensor = Tensor::rand(
    &[batch_size, sequence_length, hidden_size],
    (Kind::Float, device),
);

let pooler_output = no_grad(|| pooler.forward(&input_tensor));