Update app.py

app.py

@@ -7,15 +7,10 @@ import requests
 import random
 import urllib.parse
 import spacy
-import nltk
-from nltk.tokenize import word_tokenize, sent_tokenize
-from sklearn.feature_extraction.text import TfidfVectorizer
 from sklearn.metrics.pairwise import cosine_similarity
 import numpy as np
-from nltk.tokenize import sent_tokenize
 from typing import List, Dict
 from tempfile import NamedTemporaryFile
-from typing import List, Dict
 from bs4 import BeautifulSoup
 from langchain.prompts import PromptTemplate
 from langchain.chains import LLMChain
@@ -26,6 +21,7 @@ from langchain_core.output_parsers import StrOutputParser
 from langchain_community.embeddings import HuggingFaceEmbeddings
 from langchain_community.llms import HuggingFaceHub
 from langchain_core.documents import Document
+from sentence_transformers import SentenceTransformer
 
 huggingface_token = os.environ.get("HUGGINGFACE_TOKEN")