Problem with ipywidgets and plotly on Databricks

moseb · ‎04-09-2025

Hi everyone,

I am encountering a problem when using ipywidgets with plotly on Databricks. I am trying to pass interactive arguments to a function and then plot with plotly.

When I do the following

def f(m, b) :

plt.figure(2)

x = np.linspace(-10, 10, num=1000)

plt.plot(x, m * x + b)

plt.ylim(-5, 5)

plt.show()

interactive_plot = interactive(f, m=(-2.0, 2.0), b=(-3, 3, 0.5))

output = interactive_plot.children[-1]

output.layout.height = '350px'

interactive_plot

I obtain the expected result. The following code instead

def f(m, b) :

x = np.linspace(-10, 10, num=1000)

y = m * x + b

df = pd.DataFrame({'x': x, 'y': y})

fig = px.line(df, x='x', y='y')

fig.update_yaxes(range=[-5, 5])

fig.show()

interactive_plot = interactive(f, m=(-2.0, 2.0), b=(-3, 3, 0.5))

output = interactive_plot.children[-1]

output.layout.height = '350px'

interactive_plot

causes the message Latest error: Uncaught ReferenceError: Plotly is not defined.

I am importing plotly.express and the same code runs smoothly locally on my computer.

What could be the problem? Thank you in advance!