Update app.py

app.py

@@ -1,23 +1,9 @@
-import altair as alt
 import streamlit as st
+import pandas as pd
+import numpy as np
 
-african_countries = alt.topo_feature(
-        "https://raw.githubusercontent.com/deldersveld/topojson/master/continents/africa.json",
-        "continent_Africa_subunits",
-    )
-africa_chart = (
-    alt.Chart(african_countries)
-    .mark_geoshape(stroke="white", strokeWidth=2)
-    .encode(
-        color="value:Q",
-        tooltip=[
-            alt.Tooltip("properties.geounit:O", title="Country name"),
-            alt.Tooltip("value:Q", title="Indicator value"),
-        ],
-    )
-    .transform_lookup(
-        lookup="properties.geounit",
-        from_=alt.LookupData(filtered_data, "Geo Name", ["value"]),
-    )
-)
-st.altair_chart(africa_chart)
+df = pd.DataFrame(
+     np.random.randn(1000, 2) / [50, 50] + [37.76, -122.4],
+     columns=['lat', 'lon'])
+
+st.map(df)