Update app.py

app.py

@@ -3,4 +3,34 @@ from langchain.chat_models import ChatOpenAI
 from langchain.schema import (AIMessage, HumanMessage, SystemMessage)
 
 st.set_page_config(page_title="LangChain Demo", page_icon=":robot:")
-st.header("Hey, I'm your Chat GPT")
+st.header("Hey, I'm your Chat GPT")
+
+if "sessionMessages" not in st.session_state:
+    st.session_state.sessionMessages = [SystemMessage(content="You are an helpful assistant.")]
+
+chat = ChatOpenAI(temperature=0)
+
+def load_answer(question):
+    
+    
+    st.session_state.sessionMessages.append(HumanMessage(content=question))
+
+    assistant_answer = chat(st.session_state.sessionMessages)
+
+    st.session_state.sessionMessages.append(AIMessage(content=assistant_answer.content))
+    
+    return assistant_answer
+
+
+def get_text():
+    input_text = st.text_input("You: ", key=input)
+    return input_text
+
+user_input = get_text()
+
+submit = st.button("Generate")
+
+if submit:
+    response = load_answer(user_input)
+    st.subheader("Answer:")
+    st.write(response, key=1)