Create app.py

app.py

@@ -0,0 +1,33 @@
+from openai import OpenAI
+import streamlit as st
+import os  # Import the os module
+
+# Fetch the API key from an environment variable
+openai_api_key = os.getenv("OPENAI_API_KEY")
+
+st.title("💬 Chatbot")
+st.caption("🚀 A streamlit chatbot powered by OpenAI LLM")
+if "messages" not in st.session_state:
+    st.session_state["messages"] = [{"role": "assistant", "content": "How can I help you?"}]
+
+for msg in st.session_state.messages:
+    st.chat_message(msg["role"]).write(msg["content"])
+
+if prompt := st.chat_input():
+    if not openai_api_key:
+        st.error("No OpenAI API key found. Please set the OPENAI_API_KEY environment variable.")
+        st.stop()
+
+    client = OpenAI(api_key=openai_api_key)
+    st.session_state.messages.append({"role": "user", "content": prompt})
+    st.chat_message("user").write(prompt)
+    response = client.chat.completions.create(model="gpt-3.5-turbo", messages=st.session_state.messages)
+    msg = response.choices[0].message.content
+    st.session_state.messages.append({"role": "assistant", "content": msg})
+    st.chat_message("assistant").write(msg)
+
+# Links and additional information in the sidebar
+with st.sidebar:
+    "[Get an OpenAI API key](https://platform.openai.com/account/api-keys)"
+    "[View the source code](https://github.com/streamlit/llm-examples/blob/main/Chatbot.py)"
+    "[![Open in GitHub Codespaces](https://github.com/codespaces/badge.svg)](https://codespaces.new/streamlit/llm-examples?quickstart=1)"