Error: HoloViews bokeh backend could not be imported

Hi, I just tried to run the examples from the blogpost in jupyter lab. But i´m getting an error right at the beginning:

import numpy as np
import xarray as xr
import pandas as pd
import holoviews as hv
import geoviews as gv
import iris
import cartopy

from cartopy import crs
from cartopy import feature as cf
from geoviews import feature as gf

hv.notebook_extension('bokeh','matplotlib')
%output backend='matplotlib'
%opts Feature [projection=crs.Robinson()]

WARNING:root:notebook_extension: HoloViews bokeh backend could not be imported, ensure bokeh is installed.

but i have installed it:

import bokeh
print("bokeh",bokeh.__version__)
print("holoviews",hv.__version__)
print("geoviews",gv.__version__)

bokeh 0.12.10 holoviews 1.8.4-x-gde78cf33a geoviews 1.3.2

any ideas what icould be wrong?

[dycw]

As of today, bokeh releases include 2.0.0 and 1.4.0; the former did not work for me whilst the latter did.

[junaidahmed361]

Hi, I just tried to run holoviews with bokeh backend and got the same error, but different import issue. WARNING:root:notebook_extension: Holoviews bokeh extension could not be imported, it raised the following exception: ImportError(‘cannot import name ‘Selection’’).

I installed via pip for both holoviews and bokeh, and am trying to use both in jupyter lab.