import folium
from folium.plugins import MarkerCluster
import pandas as pd
cyclemap = folium.Map(location = [51.5074, -0.1278],
                  tiles='CartoDB positron',
                  zoom_start = 11,
                  width = 800, height = 600)

cycleincidences = pd.read_csv("2016cyclists.csv")

MAX_RECORDS = 50
#using max records for speed as I have almost 5000 data points

marker_cluster = folium.MarkerCluster().add_to(cyclemap)

for each in cycleincidences[0:MAX_RECORDS].iterrows():
 folium.Marker(
    location = [each[1]['X'],each[1]['Y']]
    ).add_to(marker_cluster)

cyclemap.save('cylesmap3.html')