Update app.py

app.py

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+
+
+import streamlit as st
+
+# ✅ Ensure this is the first Streamlit command
+st.set_page_config(page_title="Gemini Chatbot", layout="wide")
+
+st.markdown("""
+    <h1 style="text-align:center; color: #FF4500;">Welcome To Gemini CodeReviewer using Gemini API.....</h1>
+""", unsafe_allow_html=True)
+
+
+import google.generativeai as genai
+
+
+# Configure Gemini API Key
+genai.configure(api_key="AIzaSyBNuAnoR316s3mlaVY6zsgtmarKR4ZbajE")
+
+
+# Function to get Gemini response
+def get_gemini_response(prompt):
+    model = genai.GenerativeModel("models/gemini-2.0-flash")
+    response = model.generate_content(prompt)
+    return response.text if response.text else "Sorry, I couldn't understand that."
+
+# Chat interface
+if "messages" not in st.session_state:
+    st.session_state.messages = []
+
+for message in st.session_state.messages:
+    with st.chat_message(message["role"]):
+        st.markdown(message["content"])
+
+user_input = st.chat_input("Type your message...")
+
+if user_input:
+    st.session_state.messages.append({"role": "user", "content": user_input})
+    with st.chat_message("user"):
+        st.markdown(user_input)
+
+    response = get_gemini_response(user_input)
+    st.session_state.messages.append({"role": "assistant", "content": response})
+    with st.chat_message("assistant"):
+        st.markdown(response)