AttributeError when producing an Interactive plot

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.

[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.

[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.