Not able to display altair charts in jupyter notebook
For 'altair' version of '4.1.0',
'vega' version of '3.4.0'
just do alt.renderers.enable('default') instead of
alt.renderers.enable('notebook')
I am not able to display the charts on jupyter notebook. The same code displays on chrome in one laptop but does not work on chrome on other laptop. 
I do not see any error or even a empty plot when I execute the code but get alt.Chart(...) in the output.
The version of altair and vega etc are same on both the laptops.