enable assignment of "Download plot as a png" value to variable

Bug (or Feature Request?):

I want to get the annotated image after I used drawrect. The only possible way, for now, is using the Download plot as a png button, save it on pc, read it. Is there a straightforward way to do that?

I mark it as a bug (or maybe it's the intended behavior by the developer) because fig.to_image(format="png", engine="kaleido") return the original image, not the annotated one.

Note: I'm using a jupyter notebook

import plotly.graph_objects as go
fig = go.Figure(data=go.Bar(y=[2, 3, 1]))
config = dict({    
    'modeBarButtonsToAdd':[
        'drawrect',
        'eraseshape',
    ],
    'modeBarButtonsToRemove':[
        'toggleSpikelines','hoverCompareCartesian'
    ]
})
fig.show(config=config)

do some annotations...

then run:

import numpy as np
import cv2
import matplotlib.pyplot as plt
annotate_image = fig.to_image(format="png", engine="kaleido")
nparr = np.frombuffer(annotate_image, np.uint8)
img_numpy = cv2.imdecode(nparr, cv2.IMREAD_COLOR)
plt.imshow(img_numpy[...,::-1])

The plt.imshow(img_numpy[...,::-1]) will show the original image, not the annotated image. How to use fig.to_image(format="png", engine="kaleido") to include the annotation of drawrect? Or any workaourd?

Inizia dal punto di ingresso fig.show(config=config) e dall’interazione drawrect, quindi confrontali con fig.to_image(format="png", engine="kaleido"). Determina se lo stato annotato può essere trasmesso attraverso il percorso di esportazione esistente; il lavoro è considerato completato quando l’immagine assegnata risultante include il rettangolo disegnato. Nell’issue non sono indicati file del repository o test.