Color scatter example in Gallery shows nothing in browser

ALL software version info (bokeh, python, notebook, OS, browser, any other relevant packages)

• Python: Python 3.6.4 :: Anaconda custom (64-bit)
• bokeh: 0.12.14
• OS: Windows 10
• Chrome: 64.0.3282.186

Description of expected behavior and the observed behavior

I run the Color scatter example in Gallery and the html file is generated. But It shows nothing in my chrome.

Complete, minimal, self-contained example code that reproduces the issue

The code is same as the example.

import numpy as np

from bokeh.plotting import figure, show, output_file

N = 4000
x = np.random.random(size=N) * 100
y = np.random.random(size=N) * 100
radii = np.random.random(size=N) * 1.5
colors = [
    "#%02x%02x%02x" % (int(r), int(g), 150) for r, g in zip(50+2*x, 30+2*y)
]

TOOLS="hover,crosshair,pan,wheel_zoom,zoom_in,zoom_out,box_zoom,undo,redo,reset,tap,save,box_select,poly_select,lasso_select,"

p = figure(tools=TOOLS)

p.scatter(x, y, radius=radii,
          fill_color=colors, fill_alpha=0.6,
          line_color=None)

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

show(p)  # open a browser

Stack traceback and/or browser JavaScript console output

Chrome console output:

Uncaught Error: Model 'Slider' does not exist. This could be due to a widget
                     or a custom model not being registered before first usage.
    at Object.i.Models (bokeh-0.12.14.min.js:1)
    at Function.t._instantiate_object (bokeh-0.12.14.min.js:1)
    at Function.t._instantiate_references_json (bokeh-0.12.14.min.js:1)
    at Function.t.from_json (bokeh-0.12.14.min.js:1)
    at bokeh-0.12.14.min.js:1
    at bokeh-0.12.14.min.js:1

Screenshots or screencasts of the bug in action

It shows nothing.

Here is the generated html file.

[bryevdv]

The long and the short of it is, you have output that seems to combine data and models from at least three different examples. Have never seen anything like this ever, if you are running scripts in separate processes, so it will be necessary to know more exactly what steps you have followed. If you are running the code one after the other in a single python process, that is important information, you’ll probably need to call reset_output between each.

[secsilm]

@bryevdv Thank you for your detailed explanation. I reruned the code in my computer and it finally worked! I guess the reason is that I runed several exzample code one by one in a single python process and didn’t call reset_output between each(didn’t konw that function before) yesterday. Thank you again.