Add individual elements to a foilum map in a cluster object

def add_to_map(map_obj, lat, lon, date_time, key, cluster_obj):
        """Add individual elements to a foilum map in a cluster object"""
        text = "Event {0} at {1}".format(key, date_time.split()[1])
        folium.Marker([lat, lon], popup=text).add_to(cluster_obj)