Need Help - Using Callbacks to update Bar Graph


I am a newbie to Dash, I really find it awesome. Please will need help on how to use callbacks to update a simple bar graph. Data dose not reflect even when server runs.
Here is my code:

import dash
from dash.dependencies import Output, Event
import dash_core_components as dcc
import dash_html_components as html
import plotly
import plotly.graph_objs as go
from collections import deque
import pandas as pd

app = dash.Dash(__name__)

colors = {
    'background': '#111111',
    'background2': '#FF0',
    'text': '#7FDBFF'

app.layout = html.Div( children = [ 


@app.callback(Output('cx1', 'figure'))
            #[Input('cxx', 'value')])
                #events=[Event('graph-update2', 'interval')])

def update_figure( ):
	return  {
                    'data': [
                        {'x': ['APC'], 'y': [9], 'type': 'bar', 'name': 'APC'},
                        {'x': ['PDP'], 'y': [8], 'type': 'bar', 'name': 'PDP'},
                    'layout': {
                        'title': 'Basic Dash Example',
                        'plot_bgcolor': colors['background'],
                        'paper_bgcolor': colors['background']

if __name__ == '__main__':


I think you are looking at outdated documentation, check this out to see how to use Interval component (I think Events don’t work anymore)


You may not even need to use live updates. It’s incredibly difficult to tell what your inputs are intended to be so your current snippet contains a good number of flaws. The @app.callback NEEDS an Input AND and Output. I would recommend just looking at some more example snippets but @PSoriano is right, I’ve never seen Event since I’ve been using Dash, only Input, Output, and State.