streamlit_app.py

import os, streamlit as st
import pandas as pd
from polygon import RESTClient

st.subheader("Polygon+Streamlit Demo App")
symbol = st.text_input("Enter a stock symbol", "AAPL")

with st.sidebar:
    #Get your Polygon API key from the dashboard. 
    #In a real app you want to store this as a secret in your .env
    polygon_api_key = st.text_input("Polygon API Key", type="password")

    # Authenticate with the Polygon API
    client = RESTClient(polygon_api_key)

    col1, col2, col3 = st.columns(3)
		
#Stock details
if col1.button("Get Details"):
    if not polygon_api_key.strip() or not symbol.strip():
        st.error("Please add your Polygon API Key on the left <--")
    else:
        try:
            details = client.get_ticker_details(symbol)
            st.success(f"Ticker: {details.ticker}\\n\\n"
                f"Company Address: {details.address}\\n\\n"
                f"Market Cap: {details.market_cap}")
        except Exception as e:
            st.exception(f"Exception: {e}")