folium_map.py

# create a map
m = folium.Map(location=[np.median(gdf_income_tax['centroid_lat'].tolist()),
                         np.median(gdf_income_tax['centroid_lon'].tolist())],
               tiles='Stamen Toner', zoom_start=12)

## add chloropleth layer
m.choropleth(
    geo_data=geojson,
    name='Income Tax Per Capita',
    data=gdf_income_tax,
    columns=['name', 'inc_tax_per_capita'],
    fill_color='YlGn',
    key_on='feature.geometry.name',
    legend_name='inc_tax_per_capita'
)  

# add markers with basic information
fg = folium.FeatureGroup(name='District Info')
for lat, lon, val, name in zip(gdf_income_tax['centroid_lat'].tolist(),
                               gdf_income_tax['centroid_lon'].tolist(),
                               gdf_income_tax['inc_tax_per_capita'].tolist(),
                               gdf_income_tax['name'].tolist()):
    html = f"""
    <h2>{name}<\h2><br>
    <h4>Income Tax Per Capita: {int(round(val,0))} HUF <\h4>
    """
    fg.add_child(folium.Marker(location=[lat, lon], popup=html))

m.add_child(fg)

# enable layers to be turned in or out
folium.LayerControl().add_to(m)