paddlenlp.taskflow.sentiment_analysis 源代码

# coding:utf-8
# Copyright (c) 2021  PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import glob
import json
import math
import os
import copy
import itertools

import paddle
import paddle.nn as nn
import paddle.nn.functional as F
from ..datasets import load_dataset, MapDataset
from ..data import Stack, Pad, Tuple, Vocab, JiebaTokenizer
from ..transformers import SkepTokenizer
from .utils import download_file, add_docstrings, static_mode_guard, dygraph_mode_guard
from .models import BoWModel, LSTMModel, SkepSequenceModel
from .task import Task

URLS = {
    "bilstm_vocab":
    ["https://paddlenlp.bj.bcebos.com/data/senta_word_dict.txt", None],
    "bilstm": [
        "https://paddlenlp.bj.bcebos.com/taskflow/sentiment_analysis/bilstm/bilstm.pdparams",
        "609fc068aa35339e20f8310b5c20887c"
    ],
    "skep_ernie_1.0_large_ch": [
        "https://paddlenlp.bj.bcebos.com/taskflow/sentiment_analysis/skep_ernie_1.0_large_ch/skep_ernie_1.0_large_ch.pdparams",
        "cf7aa5f5ffa834b329bbcb1dca54e9fc"
    ]
}

usage = r"""
           from paddlenlp import Taskflow 

           senta = Taskflow("sentiment_analysis")
           senta("怀着十分激动的心情放映,可是看着看着发现,在放映完毕后,出现一集米老鼠的动画片")
           '''
           [{'text': '怀着十分激动的心情放映,可是看着看着发现,在放映完毕后,出现一集米老鼠的动画片', 'label': 'negative', 'score': 0.6691398620605469}]
           '''

           senta(["怀着十分激动的心情放映,可是看着看着发现,在放映完毕后,出现一集米老鼠的动画片", 
                  "作为老的四星酒店,房间依然很整洁,相当不错。机场接机服务很好,可以在车上办理入住手续,节省时间"])
           '''
           [{'text': '怀着十分激动的心情放映,可是看着看着发现,在放映完毕后,出现一集米老鼠的动画片', 'label': 'negative', 'score': 0.6691398620605469}, 
            {'text': '作为老的四星酒店,房间依然很整洁,相当不错。机场接机服务很好,可以在车上办理入住手续,节省时间', 'label': 'positive', 'score': 0.9857505559921265}
           ]
           '''

           senta = Taskflow("sentiment_analysis", model="skep_ernie_1.0_large_ch")
           senta("作为老的四星酒店,房间依然很整洁,相当不错。机场接机服务很好,可以在车上办理入住手续,节省时间。")
           '''
           [{'text': '作为老的四星酒店,房间依然很整洁,相当不错。机场接机服务很好,可以在车上办理入住手续,节省时间。', 'label': 'positive', 'score': 0.984320878982544}]
           '''
         """


[文档]class SentaTask(Task): """ Sentiment analysis task using RNN or BOW model to predict sentiment opinion on Chinese text. Args: task(string): The name of task. model(string): The model name in the task. kwargs (dict, optional): Additional keyword arguments passed along to the specific task. """ def __init__(self, task, model, **kwargs): super().__init__(task=task, model=model, **kwargs) self._static_mode = True self._label_map = {0: 'negative', 1: 'positive'} self._construct_tokenizer(model) if self._static_mode: self._get_inference_model() else: self._construct_model(model) self._usage = usage def _construct_input_spec(self): """ Construct the input spec for the convert dygraph model to static model. """ self._input_spec = [ paddle.static.InputSpec( shape=[None, None], dtype="int64", name='token_ids'), paddle.static.InputSpec( shape=[None], dtype="int64", name='length') ] def _construct_model(self, model): """ Construct the inference model for the predictor. """ vocab_size = self.kwargs['vocab_size'] pad_token_id = self.kwargs['pad_token_id'] num_classes = 2 # Select the senta network for the inference model_instance = LSTMModel( vocab_size, num_classes, direction='bidirect', padding_idx=pad_token_id, pooling_type='max') model_path = download_file(self._task_path, model + ".pdparams", URLS[model][0], URLS[model][1]) # Load the model parameter for the predict state_dict = paddle.load(model_path) model_instance.set_dict(state_dict) self._model = model_instance def _construct_tokenizer(self, model): """ Construct the tokenizer for the predictor. """ full_name = download_file(self._task_path, "senta_word_dict.txt", URLS['bilstm_vocab'][0], URLS['bilstm_vocab'][1]) vocab = Vocab.load_vocabulary( full_name, unk_token='[UNK]', pad_token='[PAD]') vocab_size = len(vocab) pad_token_id = vocab.to_indices('[PAD]') # Construct the tokenizer form the JiebaToeknizer self.kwargs['pad_token_id'] = pad_token_id self.kwargs['vocab_size'] = vocab_size tokenizer = JiebaTokenizer(vocab) self._tokenizer = tokenizer def _preprocess(self, inputs, padding=True, add_special_tokens=True): """ Transform the raw text to the model inputs, two steps involved: 1) Transform the raw text to token ids. 2) Generate the other model inputs from the raw text and token ids. """ inputs = self._check_input_text(inputs) # Get the config from the kwargs batch_size = self.kwargs[ 'batch_size'] if 'batch_size' in self.kwargs else 1 num_workers = self.kwargs[ 'num_workers'] if 'num_workers' in self.kwargs else 0 examples = [] filter_inputs = [] for input_data in inputs: if not (isinstance(input_data, str) and len(input_data) > 0): continue filter_inputs.append(input_data) ids = self._tokenizer.encode(input_data) lens = len(ids) examples.append((ids, lens)) batchify_fn = lambda samples, fn=Tuple( Pad(axis=0, pad_val=self._tokenizer.vocab.token_to_idx.get('[PAD]', 0)), # input_ids Stack(dtype='int64'), # seq_len ): fn(samples) batches = [ examples[idx:idx + batch_size] for idx in range(0, len(examples), batch_size) ] outputs = {} outputs['data_loader'] = batches outputs['text'] = filter_inputs self.batchify_fn = batchify_fn return outputs def _run_model(self, inputs): """ Run the task model from the outputs of the `_tokenize` function. """ results = [] scores = [] with static_mode_guard(): for batch in inputs['data_loader']: ids, lens = self.batchify_fn(batch) self.input_handles[0].copy_from_cpu(ids) self.input_handles[1].copy_from_cpu(lens) self.predictor.run() idx = self.output_handle[0].copy_to_cpu().tolist() probs = self.output_handle[1].copy_to_cpu().tolist() labels = [self._label_map[i] for i in idx] score = [max(prob) for prob in probs] results.extend(labels) scores.extend(score) inputs['result'] = results inputs['score'] = scores return inputs def _postprocess(self, inputs): """ This function will convert the model output to raw text. """ final_results = [] for text, label, score in zip(inputs['text'], inputs['result'], inputs['score']): result = {} result['text'] = text result['label'] = label result['score'] = score final_results.append(result) return final_results
[文档]class SkepTask(Task): """ Sentiment analysis task using ERNIE-Gram model to predict sentiment opinion on Chinese text. Args: task(string): The name of task. model(string): The model name in the task. kwargs (dict, optional): Additional keyword arguments passed along to the specific task. """ def __init__(self, task, model, **kwargs): super().__init__(task=task, model=model, **kwargs) self._static_mode = True self._label_map = {0: 'negative', 1: 'positive'} self._construct_tokenizer(model) if self._static_mode: self._get_inference_model() else: self._construct_model(model) self._usage = usage def _construct_model(self, model): """ Construct the inference model for the predictor. """ model_instance = SkepSequenceModel.from_pretrained( model, num_classes=len(self._label_map)) model_path = download_file(self._task_path, model + ".pdparams", URLS[model][0], URLS[model][1]) state_dict = paddle.load(model_path) model_instance.set_state_dict(state_dict) self._model = model_instance def _construct_input_spec(self): """ Construct the input spec for the convert dygraph model to static model. """ self._input_spec = [ paddle.static.InputSpec( shape=[None, None], dtype="int64"), # input_ids paddle.static.InputSpec( shape=[None, None], dtype="int64") # segment_ids ] def _construct_tokenizer(self, model): """ Construct the tokenizer for the predictor. """ tokenizer = SkepTokenizer.from_pretrained(model) self._tokenizer = tokenizer def _preprocess(self, inputs, padding=True, add_special_tokens=True): """ Transform the raw text to the model inputs, two steps involved: 1) Transform the raw text to token ids. 2) Generate the other model inputs from the raw text and token ids. """ inputs = self._check_input_text(inputs) # Get the config from the kwargs batch_size = self.kwargs[ 'batch_size'] if 'batch_size' in self.kwargs else 1 num_workers = self.kwargs[ 'num_workers'] if 'num_workers' in self.kwargs else 0 infer_data = [] examples = [] filter_inputs = [] for input_data in inputs: if not (isinstance(input_data, str) and len(input_data.strip()) > 0): continue filter_inputs.append(input_data) encoded_inputs = self._tokenizer(text=input_data, max_seq_len=128) ids = encoded_inputs["input_ids"] segment_ids = encoded_inputs["token_type_ids"] examples.append((ids, segment_ids)) batchify_fn = lambda samples, fn=Tuple( Pad(axis=0, pad_val=self._tokenizer.pad_token_id), # input ids Pad(axis=0, pad_val=self._tokenizer.pad_token_type_id), # token type ids ): [data for data in fn(samples)] batches = [ examples[idx:idx + batch_size] for idx in range(0, len(examples), batch_size) ] outputs = {} outputs['text'] = filter_inputs outputs['data_loader'] = batches self._batchify_fn = batchify_fn return outputs def _run_model(self, inputs): """ Run the task model from the outputs of the `_tokenize` function. """ results = [] scores = [] with static_mode_guard(): for batch in inputs['data_loader']: ids, segment_ids = self._batchify_fn(batch) self.input_handles[0].copy_from_cpu(ids) self.input_handles[1].copy_from_cpu(segment_ids) self.predictor.run() idx = self.output_handle[0].copy_to_cpu().tolist() probs = self.output_handle[1].copy_to_cpu().tolist() labels = [self._label_map[i] for i in idx] score = [max(prob) for prob in probs] results.extend(labels) scores.extend(score) inputs['result'] = results inputs['score'] = scores return inputs def _postprocess(self, inputs): """ The model output is tag ids, this function will convert the model output to raw text. """ final_results = [] for text, label, score in zip(inputs['text'], inputs['result'], inputs['score']): result = {} result['text'] = text result['label'] = label result['score'] = score final_results.append(result) return final_results