Hello,
I’m running on bokeh server this simple code to update bar chart from a button. But it’s not working as expected.
Any suggestion on what I’m doing wrong?
Thanks
from bokeh.plotting import figure
from bokeh.layouts import layout, widgetbox
from bokeh.io import curdoc
from bokeh.transform import factor_cmap
from bokeh.palettes import Spectral6
from bokeh.models import FactorRange
from bokeh.models.widgets import Button
from bokeh.models import ColumnDataSource
#output_file(“bars.html”)
button = Button(label=“ChangeValue”, button_type=“success”)
fruits = [‘Apples’, ‘Pears’, ‘Nectarines’, ‘Plums’, ‘Grapes’, ‘Strawberries’]
val = [5, 3, 4, 2, 4, 6]
data_dict = {‘x’:fruits,‘y’:val}
source_table_hist = ColumnDataSource(data=data_dict)
h = figure(x_range=data_dict[‘x’],plot_height=350, title=“Histogram”)
h.vbar(x=‘x’, top=‘y’, width=0.2, source=source_table_hist, legend=“x”,
line_color=‘black’, fill_color=factor_cmap(‘x’, palette=Spectral6, factors=data_dict[‘x’]))
h.xgrid.grid_line_color = None
h.y_range.start = 0
inputs = widgetbox(button)
def update():
fruits = [‘Banana’, ‘Orange’]
val = [15, 23]
data_dict = {‘x’:fruits,‘y’:val}
h.x_range=FactorRange(factors=data_dict[‘x’])
source_table_hist.data = data_dict
button.on_click(update)
l = layout([inputs,h])
curdoc().add_root(l)
curdoc().title = “Test”
