# -*- coding: utf-8 -*-
'''Test of Folium polylines'''

import folium

# Coordinates are 15 points on the great circle from Boston to 
# San Francisco.
# Reference: http://williams.best.vwh.net/avform.htm#Intermediate
coordinates = [
    [  42.3581    ,  -71.0636    ],
    [  42.82995815,  -74.78991444],
    [  43.17929819,  -78.56603306],
    [  43.40320216,  -82.37774519],
    [  43.49975489,  -86.20965845],
    [  43.46811941,  -90.04569087],
    [  43.30857071,  -93.86961818],
    [  43.02248456,  -97.66563267],
    [  42.61228259, -101.41886832],
    [  42.08133868, -105.11585198],
    [  41.4338549 , -108.74485069],
    [  40.67471747, -112.29609954],
    [  39.8093434 , -115.76190821],
    [  38.84352776, -119.13665678],
    [  37.7833    , -122.4167    ]]


# Create the map and add the line
m = folium.Map(location=[41.9, -97.3], zoom_start=4)
m.line(coordinates, line_color='#FF0000', line_weight=5)

m.create_map(path='line_example.html')

Add simple example demonstrating line()