Updates on Page Load doesn't work

Dash Python
1

The second part of this document: https://dash.plot.ly/live-updates

import datetime

import dash
import dash_html_components as html

def serve_layout():
    return html.H1('The time is: ' + str(datetime.datetime.now()))

app = dash.Dash()
app.layout = serve_layout()

if __name__ == '__main__':
    app.run_server()

It can not reload the app.layout every refresh.

2

It’s supposed to be

app.layout = serve_layout

i.e. it’s supposed to be a function (" If you change this to a function, then a new datetime will get computed everytime you refresh the page.").

3

So quickly reply.

I’v already got the problem, but the root cause is the Dash version. After upgrading, it works.

Thanks~

BTW, as you are online, can you help with this two questions? Thank you~

Dash is very good tool.

4

The old version of Dash doesn’t support such

    app.layout = serve_layout

Remember to upgrade it.

In [2]: dash.__version__
Out[2]: '0.26.3'

the above version works

5

So quickly reply.

I’v already got the problem, but the root cause is the Dash version. After upgrading, it works.

Thanks~

BTW, as you are online, can you help with this two questions? Thank you~

Dash is very good tool.