adding Pinecone code

app.py

@@ -2,15 +2,31 @@
 import streamlit as st
 from streamlit_chat import message
 
+import pinecone
+import os
+from langchain.embeddings.openai import OpenAIEmbeddings
+from langchain.vectorstores import Pinecone
+
 from langchain.chains import ConversationChain
 from langchain.llms import OpenAI
 
+embeddings = OpenAIEmbeddings()
+
+pinecone.init(
+ api_key=str(os.environ['PINECONE_API_KEY']), 
+ environment=str(os.environ['PINECONE_ENV']))
+
+index_name = str(os.environ['PINECONE_INDEX_NAME'])
 
 def load_chain():
-    """Logic for loading the chain you want to use should go here."""
-    llm = OpenAI(temperature=0)
-    chain = ConversationChain(llm=llm)
-    return chain
+ docsearch = Pinecone.from_existing_index(index_name, embeddings)
+ return docsearch
+
+# def load_chain():
+#     """Logic for loading the chain you want to use should go here."""
+#     llm = OpenAI(temperature=0)
+#     chain = ConversationChain(llm=llm)
+#     return chain
 
 chain = load_chain()
 
@@ -33,7 +49,8 @@ def get_text():
 user_input = get_text()
 
 if user_input:
-    output = chain.run(input=user_input)
+    docs = chain.similarity_search(user_input)
+    output = docs[0].page_content
 
     st.session_state.past.append(user_input)
     st.session_state.generated.append(output)