BUG(?): Player doesn't play if displaying twice

[hai-schrodinger]

Hi there,

Please try above. If display once, the player will play and the slider value keeps changing. If displaying twice and clicking the play button, the slider value only changes once.

[afonit]

Putting your code here so others can reproduce more quickly - I can confirm the behavior you are seeing.

from ipywidgets import IntSlider, Play
from traitlets import link

player = Play()
slider = IntSlider(max=10, min=0, step=1)
link((player, 'value'), (slider, 'value'))
slider

the behavior also occurs when using observe (not sure if that does the exact same thing as the link you used)

from ipywidgets import IntSlider, Play, HBox
from traitlets import link

player = Play(interval=500)
slider = IntSlider(max=100, min=0, step=1)
# link((player, 'value'), (slider, 'value'))

def on_value_change(change):
    slider.value = change['new']
    # print(change['new'])
    

player.observe(on_value_change, names='value')

# uncomment the below line to see the working model
# HBox([slider, player])

# uncomment the below line to see that when you hit play it only increments once for each time play is clicked
# HBox([slider, player, player])