Update app.py

app.py

@@ -3,6 +3,7 @@ import gradio as gr
 from langchain.embeddings import CohereEmbeddings
 from langchain.prompts import PromptTemplate
 from langchain import OpenAI
+from langchain_cohere import ChatCohere
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 import os
 import numpy as np