I was getting no response on my last post.
Bokeh version 0.12.1
OSX 10.11.6
I am getting an AttributeError("‘BasicProperty’ object has no attribute ‘from_json’",) and I don’t know where its coming from. Attached are the log files from terminal and pycharm.
Here is some example code that gives the same error.
from bokeh.plotting import Figure, ColumnDataSource, show, vplot
from bokeh.io import output_file
from bokeh.models import (Slider, CustomJS, GMapPlot,
GMapOptions, DataRange1d, Circle, Line)
import numpy as np
from bokeh.plotting import curdoc, figure
from bokeh.layouts import row, column, widgetbox
from bokeh.client import push_session
output_file(“path.html”)
Create path around roundabout
r = 0.000192
x1 = np.linspace(-1,1,100)*r
x2 = np.linspace(1,-1,100)*r
x = np.hstack((x1,x2))
f = lambda x : np.sqrt(r2 - x2)
y1 = f(x1)
y2 = -f(x2)
y = np.hstack((y1,y2))
init_x = 40.233688
init_y = -111.646784
lon = init_x + x
lat = init_y + y
Initialize data sources.
location = ColumnDataSource(data=dict(x=[lon[0]], y=[lat[0]]))
path = ColumnDataSource(data=dict(x=lon, y=lat))
Initialize figure, path, and point
“”"I haven’t been able to verify that the GMapPlot code below works, but
this should be the right thing to do. The zoom may be totally wrong,
but my latlng points should be a path around a roundabout.
“”"
options = GMapOptions(lat=40.233681, lng=-111.646595, map_type=“roadmap”, zoom=15)
fig = GMapPlot(x_range=DataRange1d(), y_range=DataRange1d(), map_options=options,api_key=‘XXXXXXXXXXXXXXXX’)
fig = Figure(plot_height=600, plot_width=600)
c = Circle(x=‘x’, y=‘y’, size=10)
p = Line(x=‘x’, y=‘y’)
fig.add_glyph(location, c)
fig.add_glyph(path, p)
Slider callback
callback = CustomJS(args=dict(location=location, path=path), code="""
var loc = location.get('data');
var p = path.get('data');
t = cb_obj.get('value');
/* set the point location to the path location that
corresponds to the slider position */
loc['x'][0] = p['x'][t];
loc['y'][0] = p['y'][t];
location.trigger('change');
“”")
The way I have written this, ‘start’ has to be 0 and
‘end’ has to be the length of the array of path points.
slider = Slider(start=0, end=200, step=1, callback=callback)
layout = column(fig, slider)
curdoc().clear()
curdoc().add_root(layout)
session = push_session(curdoc())
session.show()
session.loop_until_closed()
``
**Sarah Birds - Response **
I’m not sure what’s going on, but I’ve started a little debugging
If you run bokeh-serve with --log-level=debug
You see the source of the error is:
File “/Users/caged/Dev/bokeh/bokeh/bokeh/core/properties.py”, line 1236, in from_json
attrs[name] = prop.from_json(value, models)
AttributeError: ‘BasicProperty’ object has no attribute ‘from_json’
I stuck a print statement in to print out “prop” and it always prints out a GMapOptions value - although not always the same one - which makes sense because GMapOptions a dictionary.
e.g.
zoom:Int
map_type:Enum(‘satellite’, ‘roadmap’, ‘terrain’, ‘hybrid’)
lng:Float
lat:Float
I think there’s some kind of serialization problem with GMapPlot and the server (although maybe it’s wider). Hopefully Bryan has some thoughts.
