Update app.py

app.py

@@ -3,6 +3,8 @@ from dotenv import load_dotenv
 from langchain import PromptTemplate, LLMChain, HuggingFaceHub
 # from langchain.llms import CTransformers
 from langchain_community.llms import CTransformers
+from langchain_core.prompts import PromptTemplate
+from langchain.llms import HuggingFacePipeline
 from transformers import AutoModelForCausalLM, AutoTokenizer
 from transformers import pipeline
 from langchain.llms.huggingface_pipeline import HuggingFacePipeline