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| from typing import List, Tuple | |
| from typing_extensions import Literal | |
| import logging | |
| import pandas as pd | |
| from pandas import DataFrame, Series | |
| from utils.config import getconfig | |
| from utils.preprocessing import processingpipeline | |
| import streamlit as st | |
| from transformers import pipeline | |
| # Labels dictionary ### | |
| _lab_dict = { | |
| 'GHG':'GHG', | |
| 'NOT_GHG':'NON GHG TRANSPORT TARGET', | |
| 'NEGATIVE':'OTHERS', | |
| } | |
| def load_ghgClassifier(config_file:str = None, classifier_name:str = None): | |
| """ | |
| loads the document classifier using haystack, where the name/path of model | |
| in HF-hub as string is used to fetch the model object.Either configfile or | |
| model should be passed. | |
| 1. https://docs.haystack.deepset.ai/reference/document-classifier-api | |
| 2. https://docs.haystack.deepset.ai/docs/document_classifier | |
| Params | |
| -------- | |
| config_file: config file path from which to read the model name | |
| classifier_name: if modelname is passed, it takes a priority if not \ | |
| found then will look for configfile, else raise error. | |
| Return: document classifier model | |
| """ | |
| if not classifier_name: | |
| if not config_file: | |
| logging.warning("Pass either model name or config file") | |
| return | |
| else: | |
| config = getconfig(config_file) | |
| classifier_name = config.get('ghg','MODEL') | |
| logging.info("Loading ghg classifier") | |
| doc_classifier = pipeline("text-classification", | |
| model=classifier_name, | |
| top_k =1) | |
| return doc_classifier | |
| def ghg_classification(haystack_doc:pd.DataFrame, | |
| threshold:float = 0.5, | |
| classifier_model:pipeline= None | |
| )->Tuple[DataFrame,Series]: | |
| """ | |
| Text-Classification on the list of texts provided. Classifier provides the | |
| most appropriate label for each text. these labels are in terms of if text | |
| belongs to which particular Sustainable Devleopment Goal (SDG). | |
| Params | |
| --------- | |
| haystack_doc: List of haystack Documents. The output of Preprocessing Pipeline | |
| contains the list of paragraphs in different format,here the list of | |
| Haystack Documents is used. | |
| threshold: threshold value for the model to keep the results from classifier | |
| classifiermodel: you can pass the classifier model directly,which takes priority | |
| however if not then looks for model in streamlit session. | |
| In case of streamlit avoid passing the model directly. | |
| Returns | |
| ---------- | |
| df: Dataframe with two columns['SDG:int', 'text'] | |
| x: Series object with the unique SDG covered in the document uploaded and | |
| the number of times it is covered/discussed/count_of_paragraphs. | |
| """ | |
| logging.info("Working on GHG Extraction") | |
| haystack_doc['GHG Label'] = 'NA' | |
| haystack_doc['GHG Score'] = 0.0 | |
| # applying GHG Identifier to only 'Target' paragraphs. | |
| temp = haystack_doc[haystack_doc['Target Label'] == 'TARGET'] | |
| temp = temp.reset_index(drop=True) | |
| df = haystack_doc[haystack_doc['Target Label'] == 'NEGATIVE'] | |
| df = df.reset_index(drop=True) | |
| if not classifier_model: | |
| classifier_model = st.session_state['ghg_classifier'] | |
| results = classifier_model(list(temp.text)) | |
| labels_= [(l[0]['label'],l[0]['score']) for l in results] | |
| temp['GHG Label'],temp['GHG Score'] = zip(*labels_) | |
| temp['GHG Label'] = temp['GHG Label'].apply(lambda x: _lab_dict[x]) | |
| # merge back Target and non-Target dataframe | |
| df = pd.concat([df,temp]) | |
| df = df.reset_index(drop =True) | |
| df['GHG Score'] = df['GHG Score'].round(2) | |
| df.index += 1 | |
| return df | |