Bokeh serve does not work with module names with spaces

I have a file called “bokeh app.py” saved in Documents folder as follows:

import pandas as pd
import numpy as np
from bokeh.plotting import figure
from bokeh.io import output_file, show, curdoc
from bokeh.plotting import ColumnDataSource
from bokeh.models import HoverTool, Slider
from bokeh.models import CategoricalColorMapper
from bokeh.layouts import row, column, gridplot, widgetbox
from bokeh.models.widgets import Panel, Tabs

a = 0.3; b = 10.04
x = np.arange(a, b, (b-a)/300)
a = -0.1; b = 0.1
y = np.arange(a, b, (b-a)/300)

source = ColumnDataSource(data={'x':x, 'y':y})

plot = figure()
plot.line('x', 'y', source=source)

slider = Slider(title='slider', start=0, end=10, step=0.1, value=1)

def callback(attr, old, new):
    scale = slider.value
    new_y = np.sin(scale/x)
    source.data = {'x': x, 'y': new_y}

# Attach the callback to the 'value' property of slider
slider.on_change('value', callback)  

layout = column(widgetbox(slider), plot)
curdoc().add_root(layout)

When I run `bokeh serve “documents\bokeh app.py” in anaconda prompt, I got these messages:

(venv) D:\Users\jng>bokeh serve "documents\bokeh app.py"
2020-03-10 11:28:11,906 Starting Bokeh server version 2.0.0 (running on Tornado 5.1.1)
2020-03-10 11:28:12,004 User authentication hooks NOT provided (default user enabled)
2020-03-10 11:28:12,101 Bokeh app running at: http://localhost:5006/bokeh app
2020-03-10 11:28:12,103 Starting Bokeh server with process id: 13852

But no visual displayed anywhere. I then entered this http://localhost:5006/bokeh app in chrome browser, it said “404: Not Found”, and some additional messages appeared in the anaconda prompt

(venv) D:\Users\jng09>bokeh serve "documents\bokeh app.py"
2020-03-10 11:28:11,906 Starting Bokeh server version 2.0.0 (running on Tornado 5.1.1)
2020-03-10 11:28:12,004 User authentication hooks NOT provided (default user enabled)
2020-03-10 11:28:12,101 Bokeh app running at: http://localhost:5006/bokeh app
2020-03-10 11:28:12,103 Starting Bokeh server with process id: 13852
2020-03-10 12:41:21,539 404 GET /bokeh%20app (::1) 1.00ms
2020-03-10 12:41:21,828 404 GET /favicon.ico (::1) 1.00ms
2020-03-10 12:51:24,548 404 GET /bokeh%20app (::1) 1.00ms

My questions are:

• Is this a bug?
• How to fix it?

Thanks

[bryevdv]

@jaseuts --show is a useful convenience for anyone running things locally on their own systems, but if you are deploying a Bokeh server in a production setting, then the instance running the bokeh serve command is most likely a remote computer in some data center, that no one has physical access to (it may not even have a display attached).

[bryevdv]

@jaseuts perhaps you should also try running with the --show option. That will raise a browser to the correct location for you, in case going to the right location is the issue you are having

bokeh serve --show bokehApp.py