df.hvplot() not working in colab

[mckeown12]

The example from the usage page returns no output in a python3 colab notebook:

!pip install hvplot holoviews

import pandas as pd, numpy as np
idx = pd.date_range('1/1/2000', periods=1000)
df  = pd.DataFrame(np.random.randn(1000, 4), index=idx, columns=list('ABCD')).cumsum()

import hvplot.pandas
df.hvplot()

With a python2 runtime, the second cell hangs.

[arabidopsis]

I got this too.... (with python3)

I think hvplot is not using the index as the x variable... doing

df=df.reset_index()
df.hvplot(x='index')

works. Is this a bug?

[ahuang11]

This worked for me; I think you need to add two steps in Colab: hv.extension('bokeh') and hvplot.show()

import holoviews as hv
hv.extension('bokeh')

import hvplot.pandas
import pandas as pd, numpy as np

idx = pd.date_range('1/1/2000', periods=1000)
df  = pd.DataFrame(np.random.randn(1000, 4), index=idx, columns=list('ABCD')).cumsum()

hvplot.show(df.hvplot())

[loopinf]

hello @ahuang11
I tried the same code but there is an ImportError

Do you have any idea?

WARNING:param.notebook_extension: Holoviews bokeh extension could not be imported, it raised the following exception: ImportError('cannot import name 'GridBox'')
---------------------------------------------------------------------------
ImportError                               Traceback (most recent call last)
<ipython-input-2-5ffd9cebd254> in <module>()
      1 import holoviews as hv
----> 2 hv.extension('bokeh')
      3 
      4 import hvplot.pandas
      5 import pandas as pd, numpy as np

2 frames
/usr/local/lib/python3.6/dist-packages/holoviews/util/__init__.py in __call__(self, *args, **params)
    698 
    699         if selected_backend is None:
--> 700             raise ImportError('None of the backends could be imported')
    701         Store.set_current_backend(selected_backend)
    702 

ImportError: None of the backends could be imported

[ahuang11]

@loopinf !pip install -U bokeh should fix it. Bokeh is probably outdated on Colab.

[jbednar]

Right; you need bokeh 1.1.0 or later.

[philippjfr]

So I'm going to close since this is a Panel/HoloViews issue and there's already this issue: holoviz/holoviews#3551