如何设置 Bokeh 图例字体？

Question

编辑：请注意，下面示例代码的语法已过时，属于Bokeh早期版本。

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如何定义用于标签的字体？我只知道如何更改标题、标记和轴的字体，但我该如何更改图例的字体？

这里有一个可供测试更改的运行示例。

from bokeh.plotting import *
from bokeh.sampledata import periodic_table
import pandas as pd

elements = periodic_table.elements
elements = elements[elements['atomic number'] <= 82]
elements = elements[~pd.isnull(elements['melting point'])]
mass = [float(x.strip('[]')) for x in elements['atomic mass']]
elements['atomic mass'] = mass

palette = list(reversed([
    '#67001f','#b2182b','#d6604d','#f4a582','#fddbc7','#f7f7f7','#d1e5f0','#92c5de','#4393c3','#2166ac','#053061'
]))

melting_points = elements['melting point']
low = min(melting_points)
high= max(melting_points)
melting_point_inds = [int(10*(x-low)/(high-low)) for x in melting_points] #gives items in colors a value from 0-10
meltingpointcolors = [palette[i] for i in melting_point_inds]

output_file("elements.html", title="elements.py example")

hold()

circle(elements['atomic mass'], elements['density'] ,
       color=meltingpointcolors, plot_width=1200, line_color='black',fill_alpha=0.8,
       size=12, title='Density vs Atomic Weight of Elements (colored by melting point)', legend="circle",
       title_text_font="times", background_fill= '#cccccc', tools='pan, wheel_zoom, box_zoom, reset')

text(elements['atomic mass'], elements['density'] +0.3,
    text=elements['symbol'],angle=0, text_color='#333333',
    text_align="center", text_font_size="10pt", text_font="times")

xaxis().axis_label='atomic weight (amu)'
yaxis().axis_label='density (g/cm^3)'
grid().grid_line_color='white'
axis().axis_label_text_font="times"
show()

- user2366975

Answer 1

我尝试了提议的方法：

p.legend().label_text_font = "times"

但是我遇到了一个错误：

TypeError: '_list_attr_splat' object is not callable

然而，当我省去括号时，它仍然工作正常：

p.legend.label_text_font = "times"

如果label_text_font不是您想要的，您可以通过诱发“超级有用”的错误消息来获取可用属性列表，例如图例或其他“list_attr_splat”对象：

p.legend.blah = "foo"

AttributeError: unexpected attribute 'blah' to Legend, 
possible attributes are border_line_alpha, border_line_cap,
border_line_color, border_line_dash, border_line_dash_offset, 
border_line_join, border_line_width, glyph_height, glyph_width,
label_height, label_standoff, label_text_align, label_text_alpha,
label_text_baseline, label_text_color, label_text_font,
label_text_font_size, label_text_font_style, label_width, 
legend_padding, legend_spacing, legends, name, orientation, 
plot, session or tags

- sharon

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谢谢！我需要的是label_text_font_size。这里没有记录：http://bokeh.pydata.org/en/latest/docs/user_guide/styling.html - tommy.carstensen

Answer 2

您需要获取当前图的Legend对象，可以通过legend绘图属性完成，并设置label_text_font属性：

plot.legend.label_text_font = "times"

请注意，这些属性名称可能会在不久的将来缩短/简化。

- bigreddot

Answer 3

对于那些在搜索“如何将图例移动到另一个角落？”时到达此页面的用户，以下是一些额外信息：

legend().orientation = "top_left"

可以接受的术语是 top_left、top_right、bottom_left 和 bottom_right。

- ThomasL

Answer 4

试试这个：

p.legend.orientation = "horizontal"

- Joselin Ceron