Update app.py

app.py

@@ -1,13 +1,15 @@
 import os
 from dotenv import load_dotenv
 import gradio as gr
-from langchain import PromptTemplate
+from langchain_core.prompts import PromptTemplate
 from langchain_huggingface import HuggingFaceEndpoint
+from langchain_core.chains import LLMChain
 
 # Load environment variables
 load_dotenv()
 
 HF_TOKEN = os.getenv("HF_TOKEN")
+
 # Initialize the HuggingFace model
 llm = HuggingFaceEndpoint(
     repo_id="mistralai/Mistral-7B-Instruct-v0.3",
@@ -15,6 +17,7 @@ llm = HuggingFaceEndpoint(
     temperature=0.7,
     max_new_tokens=200
 )
+
 # Define a prompt template for generating a blog
 TEMPLATE = """
 Write a detailed blog post on the following topic:
@@ -24,9 +27,9 @@ Make sure the blog post is informative, engaging, and well-structured.
 
 # Create a prompt template instance
 blog_prompt_template = PromptTemplate(input_variables=["topic"], template=TEMPLATE)
-prompt = blog_prompt_template
-# Initialize the LLMChain
-blog_chain = llm | prompt
+
+# Initialize the LLMChain with the HuggingFace model and prompt template
+blog_chain = LLMChain(llm=llm, prompt=blog_prompt_template)
 
 def generate_blog_post(topic: str, author_name: str) -> str:
     if topic: