Code Editor for app.py

import streamlit as st
import pandas as pd
import altair as alt

# Fetch Typhoon data from a URL
@st.cache_data
def fetch_typhoon_data(url):
    data = pd.read_csv(url)
    return data

# Main app
st.title('Typhoon Tracks Dashboard')
url = 'https://example.com/typhoon_data.csv'  # replace with actual URL
df = fetch_typhoon_data(url)

st.write('Data Overview:')
st.write(df.head())

# Create a visualization
if 'latitude' in df and 'longitude' in df:
    chart = alt.Chart(df).mark_line().encode(
        longitude='longitude:Q',
        latitude='latitude:Q',
        color='typhoon_name:N',
        tooltip=['typhoon_name:N', 'date:T']
    ).properties(
        title='Typhoon Tracks'
    )
    st.altair_chart(chart, use_container_width=True)
else:
    st.error('Data does not contain required columns for plotting. Check your dataset.')