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from bokeh.charts import Bar, output_file, show
from bokeh.charts.attributes import cat, color
from bokeh.charts.operations import blend
from bokeh.charts.utils import df_from_json
from bokeh.sampledata.olympics2014 import data

# utilize utility to make it easy to get json/dict data converted to a dataframe
df = df_from_json(data)

# filter by countries with at least one medal and sort by total medals
df = df[df['total'] > 0]
df = df.sort("total", ascending=False)

bar = Bar(df,
          values=blend('bronze', 'silver', 'gold', name='medals', labels_name='medal'),
          label=cat(columns='abbr', sort=False),
          stack=cat(columns='medal', sort=False),
          color=color(columns='medal', palette=['SaddleBrown', 'Silver', 'Goldenrod'],
          title="Medals per Country, Sorted by Total Medals",
          tooltips=[('medal', '@medal'), ('country', '@abbr')])

output_file("stacked_bar.html", title=" example")