在BokeH中绘制热图将显示空图形

from bokeh.io import output_file, show
from bokeh.models import LinearColorMapper, ColorBar
from bokeh.palettes import Inferno256
from bokeh.plotting import figure

color_mapper = LinearColorMapper(palette=Inferno256, low=data.min(), high=data.max())

p = figure(x_range=(0, data.shape[1]), y_range=(0, data.shape[0]))

p.rect(x="x", y="y", width=1, height=1, source=data, fill_color={"field": "value", "transform": color_mapper})

color_bar = ColorBar(color_mapper=color_mapper, location=(0, 0))
p.add_layout(color_bar, 'right')

output_file("heatmap.html")
show(p)