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''' | |
Author: Qiguang Chen | |
Date: 2023-01-11 10:39:26 | |
LastEditors: Qiguang Chen | |
LastEditTime: 2023-02-18 17:38:30 | |
Description: pretrained encoder model | |
''' | |
from transformers import AutoModel, AutoConfig | |
from common import utils | |
from common.utils import InputData, HiddenData | |
from model.encoder.base_encoder import BaseEncoder | |
class PretrainedEncoder(BaseEncoder): | |
def __init__(self, **config): | |
""" init pretrained encoder | |
Args: | |
config (dict): | |
encoder_name (str): pretrained model name in hugging face. | |
""" | |
super().__init__(**config) | |
if self.config.get("_is_check_point_"): | |
self.encoder = utils.instantiate(config["pretrained_model"], target="_pretrained_model_target_") | |
# print(self.encoder) | |
else: | |
self.encoder = AutoModel.from_pretrained(config["encoder_name"]) | |
def forward(self, inputs: InputData): | |
output = self.encoder(**inputs.get_inputs()) | |
hidden = HiddenData(None, output.last_hidden_state) | |
if self.config.get("return_with_input"): | |
hidden.add_input(inputs) | |
if self.config.get("return_sentence_level_hidden"): | |
padding_side = self.config.get("padding_side") | |
if hasattr(output, "pooler_output"): | |
hidden.update_intent_hidden_state(output.pooler_output) | |
elif padding_side is not None and padding_side == "left": | |
hidden.update_intent_hidden_state(output.last_hidden_state[:, -1]) | |
else: | |
hidden.update_intent_hidden_state(output.last_hidden_state[:, 0]) | |
return hidden | |