plotly.offline.iplot gives a large blank field as its output in Jupyter Notebook/Lab

Question

I am trying to create a Sankey chart in a Jupyter notebook, basing my code on the first example shown here.

I ended up with this, which I can run without getting any

Answer 1

When using Google Colab, include the snippet -

import plotly.io as pio
pio.renderers.default = 'colab'

Or use the overall import statements as -

import plotly.offline as py
py.init_notebook_mode(connected=True)
import plotly.graph_objs as go
import plotly.io as pio
pio.renderers.default = 'colab'
from plotly.offline import init_notebook_mode, iplot

This will set the rendering to Colab style and the plots will be displayed.

Hope this helps.

Answer 2

I have myself encountered a similar issue, with a sunburst plot. The blank plot was due to invalid data. I would have expected to get an error at runtime, but it appears that in some rare cases, no error is raised, and a blank plot is displayed instead.

Therefore, check your data validity, or perform a test with dummy data provided on plotly doc, in order to test if the problem comes from data or plotly/notebook interface.

Answer 3

I can get the correct display with jupyter notebook server (without any additional options), but get a blank block with jupyter lab server. Related version info:

$ jupyter lab --version
0.35.5
$ jupyter notebook --version
5.7.8
$ python -c "import plotly; print(plotly.__version__)"
3.10.0

---

So for those who are using JupyterLab, to properly display the offline plotly graphs in JupyterLab, we need to install the plotly-extension with following commands (following is excerpted from a related answer):

$ jupyter labextension install @jupyterlab/plotly-extension
$ jupyter labextension list 
$ jupyter lab build

Answer 4

I tried all the solutions suggested here, but none of them worked for me. What solved the issue was adding:

import plotly.io as pio
pio.renderers.default='notebook'

and also using fig.show("notebook") rather than simply fig.show(), as suggested here.

Answer 5

From the quickstart in the README

This displays a figure, while none of the other answers here worked for me:

import plotly.graph_objs as go
fig = go.FigureWidget()
# Display an empty figure
fig

This (in a new cell) modifies the above plot with a bar and line chart:

# Add a scatter chart
fig.add_scatter(y=[2, 1, 4, 3])
# Add a bar chart
fig.add_bar(y=[1, 4, 3, 2])
# Add a title
fig.layout.title = 'Hello FigureWidget'

If that doesn't work, make sure your install is good, e.g. pip install --user --upgrade plotly if you installed with pip

Answer 6

If none of these answers worked for you. Try this one

just do this in conda prompt opened with administrator permission

pip install pip --upgrade
conda upgrade notebook or pip install notebook --upgrade

conda install -c conda-forge ipywidgets or pip install ipywidgets

You need to have the latest versions of jupyter notebook and ipywidgets.