无法使用Bokeh服务器交互式更新渲染器（即圆形，三角形等）尺寸

Question

我能够更新Bokeh服务器渲染器的颜色和线宽，但如果我尝试更新“尺寸”，则什么也不会发生。您可以在颜色框中输入颜色（黑色，绿色，蓝色等），并且渲染器会更改颜色。我一直在调整sliders.py示例来测试。代码如下。如果在update_size方法中将glyph.size更改为glyph.line_width，则该图确实会更新线宽，但使用“size”时不会发生任何情况。我使用Python 2.7.12，Ubuntu 16.04，散景服务器0.12.5和Tornado 4.4.2。谢谢您的帮助。

import numpy as np 
from bokeh.io import curdoc 
from bokeh.layouts import row, widgetbox 
from bokeh.models import ColumnDataSource 
from bokeh.models.widgets import Slider, TextInput 
from bokeh.plotting import figure 

# Set up data 
N = 200 
x = np.linspace(0, 4*np.pi, N) 
y = np.sin(x) 
source = ColumnDataSource(data=dict(x=x, y=y)) 

# Set up widgets 
text = TextInput(title="title", value='my sine wave') 
text2 = TextInput(title="size", value='6') 
text3 = TextInput(title="color", value='red') 
offset = Slider(title="offset", value=0.0, start=-5.0, end=5.0, step=0.1) 
amplitude = Slider(title="amplitude", value=1.0, start=-5.0, end=5.0) 
phase = Slider(title="phase", value=0.0, start=0.0, end=2*np.pi) 
freq = Slider(title="frequency", value=1.0, start=0.1, end=5.1) 

# Set up plot 
plot = figure(plot_height=400, plot_width=400, title="my sine wave", 
       tools="crosshair,pan,reset,save,wheel_zoom", 
       x_range=[0, 4*np.pi], y_range=[-2.5, 2.5]) 

r = plot.circle('x', 'y', source=source, size=int(text2.value), line_alpha=0.6, color = text3.value, legend = 'test') 
glyph = r.glyph 

# Set up callbacks 
def update_title(attrname, old, new): 
    plot.title.text = text.value 

text.on_change('value', update_title) 

def update_size(attrname, old, new): 
    glyph.size = int(text2.value)  

text2.on_change('value', update_size) 

def update_color(attrname, old, new): 
    glyph.fill_color = text3.value 


text3.on_change('value', update_color) 

def update_data(attrname, old, new): 

    # Get the current slider values 
    a = amplitude.value 
    b = offset.value 
    w = phase.value 
    k = freq.value 

    # Generate the new curve 
    x = np.linspace(0, 4*np.pi, N) 
    y = a*np.sin(k*x + w) + b 

    source.data = dict(x=x, y=y) 

for w in [offset, amplitude, phase, freq]: 
    w.on_change('value', update_data) 


# Set up layouts and add to document 
inputs = widgetbox(text, text2, text3, offset, amplitude, phase, freq) 
plot.legend.location = "top_left" 
plot.legend.click_policy="hide" 
curdoc().add_root(row(inputs, plot, width=800)) 
curdoc().title = "Sliders" 

Answer 1

如果更改大小，则不会立即产生任何结果。但是如果你稍后做了另一个改变（例如擦洗其中一个滑块），那么尺寸会更新，所以这肯定是某种错误。我建议在提出问题的GitHub：

http://github.com/bokeh/bokeh/issues

与此同时，存储在CDS规模解决该问题的工作：

# Set up data 
N = 200 
x = np.linspace(0, 4*np.pi, N) 
y = np.sin(x) 
s = np.ones_like(y) * 6 
source = ColumnDataSource(data=dict(x=x, y=y, size=s)) 

然后在字形调用中使用的大小列：

r = plot.circle('x', 'y', size='size', source=source, 
       line_alpha=0.6, color = text3.value, legend = 'test') 

最后改变的回调，而不是更新源：

def update_size(attrname, old, new): 
    source.data['size'] = np.ones_like(y) * int(text2.value)