folium Choropleth colors showing grey only

Question

I'm trying to show happiness levels based on the country using folium choropleth, however, it doesn't work and all countries are just grey. This is what I get:

json file: https://github.com/python-visualization/folium/blob/master/examples/data/world-countries.json

csv file: https://drive.google.com/file/d/1aI5tILdPYyx0yjbgPPZcJHEqxbZ4oPBg/view?usp=sharing

and this is my code:

import folium
import pandas as pd


country_geo = 'world-countries.json'

country_data = pd.read_csv('Happiness_Dataset_2016.csv')

bins = list(country_data['Happiness Score'].quantile([0, 0.25, 0.5, 0.75, 1]))

m = folium.Map(location=[0,0], zoom_start=2)


folium.Choropleth(
    geo_data=country_geo,
    name='choropleth',
    data=country_data,
    columns=['Country','Happiness Score'],
    Key_on='feature.properties.name',
    fill_color='BuPu',
    fill_opacity=0.2,
    line_opacity=0.5,

    legend_name='Happiness Rates (%)',
    bins =bins,

    reset=True
).add_to(m)
# folium.LayerControl().add_to(m)
m
m.save('worldmap.html')

Hello Quint and welcome! Can you please edit your post to include code fences, and also name your links so they are easier to understand? — Nik P
I just uploaded the csv and json file links. and that is all the code that I got, i just need to produce an image. — quint qas

sentence sentence · Accepted Answer · 2020-05-17T10:11:04

Here the error:

Key_on='feature.properties.name',

Modify it as:

key_on='feature.properties.name',

and you get:

folium Choropleth colors showing grey only

1 Answers