Create app.py

app.py

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+from langchain_google_genai import ChatGoogleGenerativeAI
+from dotenv import load_dotenv
+import streamlit as st
+import os
+from PIL import Image
+
+
+load_dotenv()
+
+logo = Image.open('icon.jfif')
+st.set_page_config(page_title = 'ChatBot', page_icon = logo)
+
+
+st.markdown("<h1 style='text-align:center; color:black;'>ChatBot using LangChain</h1>", unsafe_allow_html = True)
+
+with open('style1.css') as f:
+        st.markdown(f'<style>{f.read()}</style>', unsafe_allow_html=True)
+
+input = st.text_input('Please enter your input here:')
+
+response_button = st.button('Get Response', type = 'primary')
+
+
+if response_button:
+    llm = ChatGoogleGenerativeAI(model="gemini-2.0-flash-lite", temperature=0.3, google_api_key=os.getenv('GOOGLE_API_KEY'))
+    response = llm.invoke(input).content
+    st.subheader('The response is')
+    st.write(response)