Jupyter notebook のなかで periodic callback を動かす実験

animate.py

from bokeh.io import output_file, output_notebook, show
from bokeh.models import *
from bokeh.layouts import *

output_notebook()

n = 0
animate_cb = None

def plot(doc):
    button = Button(label='Foo', button_type='success')
    
    def animate_update():
        global n
        button.label = f'Foo (n = {n})'
        n = n + 1
    
    def animate():
        global animate_cb
        animate_cb = doc.add_periodic_callback(animate_update, 1000) if (animate_cb is None) else doc.remove_periodic_callback(animate_cb)
    
    button.on_click(animate)
    doc.add_root(button)

show(plot)