Update src/streamlit_app.py

src/streamlit_app.py

@@ -1,40 +1,50 @@
-import altair as alt
-import numpy as np
-import pandas as pd
-import streamlit as st
-
-"""
-# Welcome to Streamlit!
-
-Edit `/streamlit_app.py` to customize this app to your heart's desire :heart:.
-If you have any questions, checkout our [documentation](https://docs.streamlit.io) and [community
-forums](https://discuss.streamlit.io).
-
-In the meantime, below is an example of what you can do with just a few lines of code:
-"""
-
-num_points = st.slider("Number of points in spiral", 1, 10000, 1100)
-num_turns = st.slider("Number of turns in spiral", 1, 300, 31)
-
-indices = np.linspace(0, 1, num_points)
-theta = 2 * np.pi * num_turns * indices
-radius = indices
-
-x = radius * np.cos(theta)
-y = radius * np.sin(theta)
-
-df = pd.DataFrame({
-    "x": x,
-    "y": y,
-    "idx": indices,
-    "rand": np.random.randn(num_points),
-})
-
-st.altair_chart(alt.Chart(df, height=700, width=700)
-    .mark_point(filled=True)
-    .encode(
-        x=alt.X("x", axis=None),
-        y=alt.Y("y", axis=None),
-        color=alt.Color("idx", legend=None, scale=alt.Scale()),
-        size=alt.Size("rand", legend=None, scale=alt.Scale(range=[1, 150])),
-    ))
+import os, asyncio, time, logging, streamlit as st
+from google.adk.agents import Agent
+from google.adk.sessions import InMemorySessionService
+from google.adk.runners import Runner
+from google.adk.tools import google_search
+from google.genai import types
+from dotenv import load_dotenv
+
+load_dotenv(); logging.basicConfig(level=logging.ERROR)
+MODEL,APP_NAME,USER_ID = "gemini-2.0-flash-exp", "search_assistant_app", "streamlit_user_search"
+agent = Agent(name="search_assistant", model=MODEL, instruction="You are a helpful assistant Answer user questions using Google Search when needed.", description="An assistant that can search the web.", tools=[google_search])
+
+@st.cache_resource
+def init_adk():
+    ss = InMemorySessionService(); r = Runner(agent=agent, app_name=APP_NAME, session_service=ss)
+    sid = st.session_state.get("adk_session_id") or f"session_{int(time.time())}_{os.urandom(4).hex()}"; st.session_state["adk_session_id"] = sid
+    try: ss.create_session(app_name=APP_NAME, user_id=USER_ID, session_id=sid, state={})
+    except: ss.create_session(app_name=APP_NAME, user_id=USER_ID, session_id=sid, state={})
+    return r, sid
+
+async def run_adk(r, sid, q):
+    try:
+        async for e in r.run_async(user_id=USER_ID, session_id=sid, new_message=types.Content(role="user", parts=[types.Part(text=q)])):
+            if e.is_final_response() and e.content and e.content.parts: return e.content.parts[0].text
+    except Exception as err: return f"Error: {err}"
+    return "[No response]"
+
+def main():
+    st.set_page_config(page_title="Search", page_icon="🔍", layout="wide"); 
+    st.markdown(
+    f'<h1><img src="https://cdn-images-1.medium.com/v2/resize:fill:1600:480/gravity:fp:0.5:0.4/1*A4-k_sI5kmrphjS4tJ_rpA.png" width="60"/> Agent Development Kit <img src="https://images.seeklogo.com/logo-png/44/2/streamlit-logo-png_seeklogo-441815.png" width="60"/></h1>',
+    unsafe_allow_html=True
+    )
+    if not os.environ.get("GOOGLE_API_KEY"): st.error("API Key missing!"); st.stop()
+    try: r, sid = init_adk(); # st.sidebar.success(f"ADK Connected (Session: ...{sid[-8:]})", icon="✅")
+    except Exception as e: st.error(f"ADK failed: {e}", icon="❌"); st.stop()
+    if "msgs" not in st.session_state: st.session_state.msgs = []
+    for msg in st.session_state.msgs:
+        with st.chat_message(msg["role"]): st.markdown(msg["content"])
+    if prompt := st.chat_input("Ask..."):
+        st.session_state.msgs.append({"role": "user", "content": prompt}); 
+        with st.chat_message("user"): st.markdown(prompt)
+        with st.chat_message("assistant"):
+            placeholder = st.empty()
+            with st.spinner("Searching..."): response = asyncio.run(run_adk(r, sid, prompt)); placeholder.markdown(response)
+        st.session_state.msgs.append({"role": "assistant", "content": response})
+    st.sidebar.image("https://cdn-images-1.medium.com/v2/resize:fill:1600:480/gravity:fp:0.5:0.4/1*A4-k_sI5kmrphjS4tJ_rpA.png", use_container_width=True)
+    st.sidebar.caption(f"**Model**: **{MODEL}**")
+
+if __name__ == "__main__": main()