Create app.py

app.py

@@ -0,0 +1,36 @@
+import streamlit as st
+
+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 am your Chat GPT")
+
+if "sessionMessages" not in st.session_state:
+    st.session_state.sessionMessages = [
+        SystemMessage(content="You are a helpful assistant.")
+    ]
+
+def load_answer(question):
+    st.session_state.sessionMessages.append(HumanMessage(content=question))
+
+    model_response = chat(st.session_state.sessionMessages)
+    st.session_state.sessionMessages.append(model_response)
+    
+    return model_response.content
+    
+
+def get_text():
+    text_input = st.text_input("You: ", key = input)
+    return text_input
+
+chat = ChatOpenAI(temperature = 0)
+
+user_input = get_text()
+
+submit = st.button("Generate")
+
+if submit:
+    response = load_answer(user_input)
+    st.subheader("Answer")
+    st.write(response, key = 1)