python-visualization/branca

Uncaught TypeError: Cannot read property 'open' of null on branca==0.4 and above

nanshanli opened this issue · 7 comments

nanshanli commented

Hi,

When using the following versions (branca==0.4, folium==0.12.1),

import folium 
folium.Map()

gives: Uncaught TypeError: Cannot read property 'open' of null

Downgrading to branca==0.3.1, folium==0.12.1 solves the problem, and the base map is rendered correctly.

Can anyone else replicate this error or know what might be the cause? I am working within a databricks notebook, on python 3.8.8.

Conengmo commented

Can you share the full stacktrace? At what line in what file does the error occur?

nanshanli commented

Unfortunately no stacktrace is produced from this error within databricks. I have also tried to look within the spark driver logs but nothing was logged at all.

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Is there anything I can execute to test out what might be wrong?

Conengmo commented

I don't know about databricks, but given that folium is not broken in general I suspect this has something to do with your setup. Sorry that's not really helpful.

nanshanli commented

No worries - I thought it might be a problem with branca since it works when I downgrade branca to 0.3. It still works with the workaround so I am not too bothered by it.

image

Conengmo commented

Could you try installing branca from our master branch? We made a change recently that might help.

nanshanli commented

oh that's great! yes, it does work with the master branch build

image

thank you - looking forward to the release!

Conengmo commented

that's good news, thanks for verifying that

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