甜甜圈图

一个使用浏览器市场份额百分比填充的甜甜圈图。此示例演示了低级 bokeh.models API。

详情

Bokeh API：

bokeh.models.AnnularWedge，bokeh.models.Legend

更多信息：

饼图和甜甜圈图

关键词：

pandas，甜甜圈图，扇形

from math import pi

from bokeh.io import show
from bokeh.models import (AnnularWedge, ColumnDataSource,
                          Legend, LegendItem, Plot, Range1d)
from bokeh.sampledata.browsers import browsers_nov_2013 as df

xdr = Range1d(start=-2, end=2)
ydr = Range1d(start=-2, end=2)

plot = Plot(x_range=xdr, y_range=ydr)
plot.title.text = "Web browser market share (November 2013)"
plot.toolbar_location = None

colors = {
    "Chrome": "seagreen",
    "Firefox": "tomato",
    "Safari": "orchid",
    "Opera": "firebrick",
    "IE": "skyblue",
    "Other": "lightgray",
}

aggregated = df.groupby("Browser").sum(numeric_only=True)
selected = aggregated[aggregated.Share >= 1].copy()
selected.loc["Other"] = aggregated[aggregated.Share < 1].sum()
browsers = selected.index.tolist()

angles = selected.Share.map(lambda x: 2*pi*(x/100)).cumsum().tolist()

browsers_source = ColumnDataSource(dict(
    start  = [0] + angles[:-1],
    end    = angles,
    colors = [colors[browser] for browser in browsers],
))

glyph = AnnularWedge(x=0, y=0, inner_radius=0.9, outer_radius=1.8,
                     start_angle="start", end_angle="end",
                     line_color="white", line_width=3, fill_color="colors")
r= plot.add_glyph(browsers_source, glyph)

legend = Legend(location="center")
for i, name in enumerate(colors):
    legend.items.append(LegendItem(label=name, renderers=[r], index=i))
plot.add_layout(legend, "center")

show(plot)