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@Tekaichi Tekaichi/

Created Mar 18, 2020
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from random import random
from bokeh.layouts import column
from bokeh.models import Button
from bokeh.palettes import RdYlBu3
from bokeh.plotting import figure, curdoc
# create a plot and style its properties
p = figure(x_range=(0, 100), y_range=(0, 100), toolbar_location=None)
p.border_fill_color = 'black'
p.background_fill_color = 'black'
p.outline_line_color = None
p.grid.grid_line_color = None
# add a text renderer to our plot (no data yet)
r = p.text(x=[], y=[], text=[], text_color=[], text_font_size="20pt",
text_baseline="middle", text_align="center")
i = 0
ds = r.data_source
# create a callback that will add a number in a random location
def callback():
global i
# BEST PRACTICE --- update .data in one step with a new dict
new_data = dict()
new_data['x'] =['x'] + [random()*70 + 15]
new_data['y'] =['y'] + [random()*70 + 15]
new_data['text_color'] =['text_color'] + [RdYlBu3[i%3]]
new_data['text'] =['text'] + [str(i)] = new_data
i = i + 1
# add a button widget and configure with the call back
button = Button(label="Press Me")
# put the button and plot in a layout and add to the document
curdoc().add_root(column(button, p))
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