AttributeError when producing an Interactive plot

[sursu]

Plotly 4.1.0

I get an error when I try to run @jonmmease 's Interact notebook:

---------------------------------------------------------------------------
AttributeError                            Traceback (most recent call last)
/opt/anaconda3/lib/python3.7/site-packages/ipywidgets/widgets/interaction.py in update(self, *args)
    254                     value = widget.get_interact_value()
    255                     self.kwargs[widget._kwarg] = value
--> 256                 self.result = self.f(**self.kwargs)
    257                 show_inline_matplotlib_plots()
    258                 if self.auto_display and self.result is not None:

<ipython-input-27-8163515321f0> in update(a, b, color)
      4 def update(a=3.6, b=4.3, color='blue'):
      5     with fig.batch_update():
----> 6         scatt.x=xs
      7         scatt.y=np.sin(a*xs-b)
      8         scatt.line.color=color

/opt/anaconda3/lib/python3.7/site-packages/plotly/basedatatypes.py in __setattr__(self, prop, value)
    349         else:
    350             # Raise error on unknown public properties
--> 351             raise AttributeError(prop)
    352 
    353     def __getitem__(self, prop):

AttributeError: x

I get the same error wen I run the notebook with Binder.

[empet]

@sursu

scatt = fig.add_scatter() is an instance of plotly.graph_objs._figurewidget.FigureWidget, and a FigureWidget has no x attribute.

Modify this this example as follows:

fig = go.FigureWidget()
fig.add_scatter()
scatt=fig.data[0]


xs=np.linspace(0, 6, 100)

@interact(a=(1.0, 4.0, 0.01), b=(0, 10.0, 0.01), color=['red', 'green', 'blue'])
def update(a=3.6, b=4.3, color='blue'):
    with fig.batch_update():
        scatt.x=xs
        scatt.y=np.sin(a*xs-b)
        scatt.line.color=color

[sursu]

That averts the error, but the plot I get is not interactive as it should be.

[empet]

@sursu Yes, you are right. Just don't rename fig.data[0]
and replace the above scatt updates as follows:

xs=np.linspace(0, 6, 100)

@interact(a=(1.0, 4.0, 0.01), b=(0, 10.0, 0.01), color=['red', 'green', 'blue'])
def update(a=3.6, b=4.3, color='blue'):
    with fig.batch_update():
        fig.data[0].x=xs
        fig.data[0].y=np.sin(a*xs-b)
        fig.data[0].line.color=color

Please address such questions on Plotly forum https://community.plot.ly/, not here.

Update: I 've just tested the initial @jonmmease's code on an environment with Plotly 3.0 and it worked. This means that at some point the new plotly upgrades made the code obsolete.

[sursu]

Yes, thank you.

You'll agree though that there is an issue with the documentation here. And issues should be reported here.

[empet]

@sursu I'm sorry, but that notebook isn't documentation. It was just an example posted in August 2018, when the Plotly version 3.0 was released.

[nicolaskruchten]

I think this is a fine place to report such issues which at first glance seem to be breakages. In this particular case, this was a breaking change we made in version 4, knowing that it would cause confusion for some people. @jonmmease it might be worth adding a note to your demo notebooks about the version?

[sursu]

Or maybe add a simple example like that in the documentation.
I see now that there is the NYC Flights example, but that is a bit convoluted for me.

[nicolaskruchten]

Ok, that’s good feedback, thanks!

For reference, the change in behaviour was documented in the version 4 migration guide here: https://plot.ly/python/v4-migration/#add-trace-return-value along with a suggested workaround for adapting older code like the notebook you were initially working from.

[gvwilson]

Hi - we are currently trying to tidy up Plotly's public repositories to help us focus our efforts on things that will help users most. Since this issue has been sitting for several years, I'm going to close it. If it's still a concern, we'd be grateful if you could open a new issue (with a short reproducible example if appropriate) so that we can add it to our backlog. Thanks for your help - @gvwilson