Update model_pipelineV2.py

model_pipelineV2.py

@@ -12,6 +12,7 @@ from langchain_core.runnables import RunnableParallel
 from langchain_core.runnables import RunnableLambda, RunnablePassthrough
 from operator import itemgetter
 from langchain_text_splitters import RecursiveCharacterTextSplitter
+import nltk
 from nltk.tokenize import word_tokenize
 from nltk.stem import PorterStemmer
 from nltk.corpus import stopwords