IPython.html.widgets in IPython say: no module named widgets

Question

God day for all. I'm trying to execute code from book "IPython Interactive Computing an Visualizing Cookbook" of Cirille Rossant on a Jupyter + IPython environment.

All work fine until I try:

from collections import OrderedDict
from IPython.display import (display, clear_output, YouTubeVideo)
from IPython.html.widgets import DropdownWidget

If I do restart to the kernel appear this message:

/usr/local/lib/python3.4/dist-packages/IPython/html.py:14: ShimWarning: The `IPython.html` package has been deprecated. You should import from `notebook` instead. `IPython.html.widgets` has moved to `ipywidgets`.
  "`IPython.html.widgets` has moved to `ipywidgets`.", ShimWarning)

then I try to change the third line (the problem) by:

from ipywidgets import DropdownWidgets

but Jupyter answer: ImportError: cannot import name 'DropdownWidget'

Can somebody help me about?

The next is a partial answer

Well, seeking on the web I find in this page ipywidgets installation the answer to my question and problem.

I try the next expample and work fine:

import numpy as np
url = "http://donnees.ville.montreal.qc.ca/dataset/f170fecc-18db-44bc-b4fe-5b0b6d2c7297/resource/ec12447d-6b2a-45d0-b0e7-fd69c382e368/download/2013.csv"
df = pd.read_csv(url, index_col='Date', parse_dates=True, dayfirst=True)
from ipywidgets import interact
@interact
def plot(n=(1, 30)):
    pd.rolling_mean(df['Berri1'], n).dropna().plot()
    plt.ylim(0, 8000)
    plt.show()

but jupyter claim that I have to do: jupyter nbextension enable --py --sys-prefix widgetsnbextension

I go to the terminal obeying the suggestion and jupyter respond:

Configure an nbextension to be automatically loaded

Options
-------

Arguments that take values are actually convenience aliases to full
Configurables, whose aliases are listed on the help line. For more information
on full configurables, see '--help-all'.

--debug
    set log level to logging.DEBUG (maximize logging output)
-y
    Answer yes to any questions instead of prompting.
--generate-config
    generate default config file
--section=<Unicode> (EnableNBExtensionApp.section)
    Default: 'notebook'
    Which config section to add the extension to. 'common' will affect all
    pages.

To see all available configurables, use `--help-all`

[EnableNBExtensionApp] CRITICAL | Bad config encountered during initialization:
[EnableNBExtensionApp] CRITICAL | Unrecognized flag: '--py'

Look that in 1 have the suggestion: jupyter nbextension enable --py widgetsnbextension but in the console suggest jupyter nbextension enable --py --sys-prefix widgetsnbextension. Note that there is a little difference but in both cases appear the same error about --py option

In this moment the question is partially answered.

The last error message looks like you need to upgrade notebook first. Most widget classes dropped the 'Widget' from their name, so DropdownWidget probably became Dropdown. — Thomas K
– Thomas K, Commented May 7, 2016 at 11:18
Thanks Thomas, you have reason, looking at the web page in the answer that I have posted, all the syntaxes changed like you say. Now I'm reviewing the notebooks and looking for similar changes. — Luis Salazar
– Luis Salazar, Commented May 10, 2016 at 11:55

Luis Salazar · Accepted Answer · 2016-05-10 11:51:28Z

1

Well, seeking on web I find on jupyter web page (jupyter) the revisited notebooks of the book and extraneously almost run fine (with some exceptions, at least on chapter 01, I go to try with the other chapters).

answered May 10, 2016 at 11:51

Luis Salazar

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