dm.event() is broken

[basnijholt]

Run in one cell

def plot_generator():
    while True:
        yield hv.Curve(np.random.rand(10))

dm = hv.DynamicMap(plot_generator(),
                   streams=[hv.streams.Stream.define('Next')()])
dm

then dm.event() has no effect and nothing appears in the JS console.

For now calling hv.streams.Stream.trigger(dm.streams) works.

Related: python-adaptive/adaptive#166

[philippjfr]

Note that I suspect this happens only when none of the streams define any actual parameters.

[douglasmacdonald]

https://github.com/pyviz/holoviews/blob/52548a6732881ed5c2cad1ad5b3ea2a163e092a3/holoviews/core/spaces.py#L1031

In the tutorial, http://holoviews.org/user_guide/Responding_to_Events.html, I could not get this to work for hv.version '1.12.0'

for i in range(40):
    dmap.event()

However, the periodic example did work

dmap.periodic(0.1, 1000, timeout=3)

I had a snoop around the code and, when I tried the loop like this it worked

for i in range(40):
    #dmap.event
    hv.streams.Stream.trigger(dmap.streams) # I got this line from periodic call.

[github-actions]

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