dataprep plot() doesn't show plots on the Google Colab interface. about dataprep

[peshotan]

Hi Brandon and Young, I would like to work on this issue, if no one else is already working on it.

[bhishanpdl]

Date: Jul 6, 2020

I am experiencing a similar problem in gcolab.

Versions

bokeh 2.1.1
dataprep 0.2.8
tornado 6.0.4

MWE:

!pip install -U tornado
!pip install dataprep

import time,os,json
import numpy as np
import pandas as pd
import seaborn as sns

import dataprep.eda as de
import bokeh.io
bokeh.io.output_notebook()

df = sns.load_dataset('titanic')
de.plot(df) # this gives nothing, does not give error but does not give any outputs.

# another attempt
from dataprep.eda import plot
plot(df) # gives no output

[korakot]

After a lot of hacking (reading) into the code. Here's how to display plot in Colab.

def _report_repr_html_(self):
    from bokeh.io.notebook import load_notebook
    from bokeh.embed.notebook import notebook_content

    load_notebook(hide_banner=True)
    (script, div, cell_doc) = notebook_content(self.to_render)
    return f'{div}<script>{script}</script>'

from dataprep.eda.report import Report
Report._repr_html_ = _report_repr_html_

Now your minimal example plot(df) should work.

[jnwang]

It seems that the issue was fixed in bokeh-2.1. I cannot test it since dataprep 0.2.6 has requirement bokeh<2.1,>=2.0, which is incompatible with bokeh 2.1.1. @dovahcrow @brandonlockhart

[jnwang]

Thank you!! No worries. We will do extensive testing. :)

[brandonlockhart]

This issue has been raised again today in a comment on our blog post. I'm getting this error on Colab:

[peshotan]

Hi Brandon and Young, for the clearing the cache issue for the plot(df), it looks like it is a CORS issue that specific to Bokeh running on Chrome (bokeh/bokeh#9773).

The plot(df) function worked well in the local Jupyter notebook using Safari. However the google colab error still exists in Safari.

For NON-dataprep bokeh gridplots were again not being display in Chrome (it threw the CORS policy error again unless you clear the cache), when I changed the browser to safari it worked again.

Code for Chrome:

Error on Chrome:

Slightly modified code for Safari:

Result on Safari:

[brandonlockhart]

@peterirani and I are getting an error in Colab with dataprep version 0.2.7. Code to reproduce:

# install
!pip install dataprep
pip install -U ipykernel

from dataprep.eda import plot
import seaborn as sbn
df = sbn.load_dataset('iris')
plot(df)

Error from the console output:
Bokeh: ERROR: Unable to run BokehJS code because BokehJS library is missing
@dovahcrow

[jnwang]

Thank you @korakot !! Would you like to submit a PR? We can put it in the next release cycle (in ~10 days).

[korakot]

@jnwang I use Colab exclusively. So, I cannot test with other environment. Hope the minimal change doesn't impact other code.

Here's my PR