Is there a go.Barpolar colorbar?

📊 Plotly Python
2

@vont,
Yes, there is a colorbar, but it is a a marker property , used when the marker color is an array of values to be mapped onto a colorscale:

import numpy as np
import plotly.graph_objects as go
r, theta = np.meshgrid(np.linspace(0, 1, 10), np.linspace(0, 360, 18))

fig = go.Figure(go.Barpolar(
    r= r.flatten(),
    theta=theta.flatten(),
    marker_color=(r.flatten())**2-0.2, #marker_color is a function of radius
    marker_colorscale="viridis", marker_colorbar_thickness=24,
    marker_cmin=0, marker_cmax=1))
fig.update_layout(width=500, height=500)

barpolar-colormapped

or marker_color is an array of values independent on r and theta:

theta=np.linspace(0, 360, 18)
r= np.ones(theta.shape)
fig = go.Figure(go.Barpolar(
    r= r.flatten(),
    theta=theta,
    marker_color=np.random.rand(18),   ,
    marker_colorscale="ice", marker_colorbar_thickness=24,
   ))
fig.update_layout(width=500, height=500)

barpolar-colormapped1