FigureWidget doesn't update in Jupyter Notebook

This snippet in a Python cell produces a chart, but the chart does not update to get the new title and new data.

import plotly.graph_objs as go
from plotly.offline import download_plotlyjs, init_notebook_mode, plot, iplot

init_notebook_mode()
data = [go.Bar(
            x=['giraffes', 'orangutans', 'monkeys'],
            y=[20, 14, 23]
    )]
layout = {'yaxis': {'range': [0, 25]}}
fig = go.FigureWidget(data, layout)
iplot(fig)

# The following code is ignored.
fig.data[0].y = (5,10,1)
fig.layout.title = "New title"

Plotly version: 3.5.0 Server Information: You are using Jupyter notebook. The version of the notebook server is: 5.7.4 The server is running on this version of Python: Python 3.7.1 (default, Dec 14 2018, 13:28:58) [Clang 4.0.1 (tags/RELEASE_401/final)]

Current Kernel Information: Python 3.7.1 (default, Dec 14 2018, 13:28:58) Type ‘copyright’, ‘credits’ or ‘license’ for more information IPython 7.2.0 – An enhanced Interactive Python. Type ‘?’ for help.

[ubershmekel]

@jonmmease When I do that - nothing is displayed after the cell completes.

[jonmmease]

Hi @ubershmekel ,

For the visual display of the FigureWidget to update you need to allow it to display itself as an ipywidget by making the fig variable the last statement in a notebook cell. In particular, you can’t use iplot. For example:

import plotly.graph_objs as go

data = [go.Bar(
            x=['giraffes', 'orangutans', 'monkeys'],
            y=[20, 14, 23]
    )]
layout = {'yaxis': {'range': [0, 25]}}
fig = go.FigureWidget(data, layout)
fig

# The following code will update the plot above
fig.data[0].y = (5,10,1)
fig.layout.title = "New title"

Does that work for you?