demog-folium.py

heat_map = folium.Map(location=[43.455737, -84.760162], zoom_start=7,
                      max_zoom=14, tiles='cartodbpositron')

with open('dataInput//donors.csv','r', newline='') as f:
   reader = csv.reader(f)
   next(reader) # skip column headers
   data = [[float(row[13]), float(row[12])] for row in reader if row[12] != '']

heat = plugins.HeatMap(data, blur=25)
heat_map.add_child(heat)
heat_map.save('heatmap.html')