jupyter-gmaps loaded but cannot be instantiated

[ylnhari]

Issue:

I was able to successfully create gmaps figure object but when tried to display the map in a jupyter cell, receiving the following error ->

[Open Browser Console for more detailed log - Double click to close this message]
Model class 'FigureModel' from module 'jupyter-gmaps' is loaded but can not be instantiated
TypeError: Class constructor L cannot be invoked without 'new'
at new t (http://localhost:8888/nbextensions/jupyter-gmaps/index.js?v=20220906161950:39:179771)
at u._make_model (http://localhost:8888/nbextensions/jupyter-js-widgets/extension.js?v=20220906161950:2:747368)

It was working fine until few weeks ago. I tried re-installing jupyter-gmaps and enabling the gmaps jupyter extension, created fresh virtual environment, tried reinstalling node.js, reinstalling jupyter etc. but got no luck. I suspect some package version issues could be a reason for this as this setup is working fine until few weeks ago please help.

Note:- also ipywidgets should not be the issue because i was able to create widgets using it and they are working fine in the same jupyter notebook.

Input code used to generate a figure :

import gmaps
gmaps.configure(api_key=google_maps_key)
fig = gmaps.figure()
markers = gmaps.marker_layer(marker_locations) # marker_locations = [(latitude1, longitude1), (latitude2, longitude2),......,]
fig.add_layer(markers)

Requirements file:

python=3.7.0
tqdm
pandas
openpyxl
xlrd
requests
ortools
jupyter
gmaps

Screen shot of the error:

[arooj1]

i am facing the same issue. Any solution so far?

[sbenston]

I was having this issue for a few days but fixed it by creating a new environment with older versions of the packages I needed, so ylnhari's suspicion that there might be some conflict with package versions seems to be on the money. Since I'm working through a class that wants us to have everything installed with Anaconda my environment isn't super custom, but it worked when I downgraded from the most up-to-date version to anaconda=5.3.0.

For a more general approach my intuition is to target the packages that are specifically referred to in gmaps's requirements.txt (six, ipython>=5.3.0, ipywidgets>=7.0.0, traitlets>=4.3.0, geojson>=2.0.0). I'm afraid I'm far too much of a novice to walk through building only what might be necessary into an environment, so I hope this is enough of a jumping off point for people who want to avoid installing bloat. However if anyone running into this issue wants a quick and dirty solution and isn't too picky about what gets added to the environment, here's what I did:

1. Create new environment with python 3.7.0
2. Activate the environment and install anaconda=5.3.0
3. Install gmaps
4. Since my environment's jupyter kernel wasn't created I used: python -m ipykernel install --user --name myenv --display-name "Python (myenv)"
5. ipywidgets widget extensions were enabled but despite using conda, gmaps's widget wasn't, so I ran: $ jupyter nbextension enable --py --sys-prefix gmaps to load it.

This is just a workaround I think if the current versions of one the gmaps requirements is causing conflicts. I went down a few rabbit holes looking into the errors that get logged to the console and came back with a potential issue with the JS compilier Babel's config. How, where and why that is now getting picked up with updates to python packages is not something I can even guess at let alone attempt to fix, but hopefully this workaround helps for people just looking for things to work!

[ylnhari]

@arooj1 , I tried running the same on my other workstation with Linux environment whose environment was untouched and it is working fine there ,now I strongly believe that this is due to some requirements libraries of g-maps that could be creating these issues try @sbenston solution let us know your experience.

[timcoote]

I fixed this in a development install by updating babel ( https://github.com/babel/babel-upgrade). The issue seems to be that webpack uses babel to transpile the JavaScript so that it works in older browsers. However, the default version, configured in js/.babelrc and described in js/package.json doesn't do this properly for ES6.

[philipperemy]

Thanks @timcoote .

After spending 7 hours on it, I finally found a way. I made a docker file that solves the problem:

FROM python:3.9.10-buster
MAINTAINER Philippe Remy <premy.enseirb@gmail.com>

EXPOSE 8888

ARG DEBIAN_FRONTEND=noninteractive

RUN apt-get update

# Install specific version of node/npm
RUN curl -fsSL https://deb.nodesource.com/setup_16.x | bash - && apt-get install -y nodejs

# Install gmaps
RUN pip install pip --upgrade
RUN pip install jupyter
WORKDIR /gmaps
RUN apt-get install git && git clone https://github.com/pbugnion/gmaps.git .

WORKDIR /gmaps/js
RUN npx babel-upgrade --write
RUN npm update

WORKDIR /gmaps
RUN bash ./dev-install

ENTRYPOINT [ "jupyter-notebook", "--ip", "0.0.0.0", "--port", "8888", "--allow-root", "." ]

[tejalbarnwal]

did anybody find here solution to using python3.8 on a virtual environment without conda and without source installation

[philipperemy]

@tejalbarnwal it's not possible. You need to use the source installation.