Once upon a time I was a fortran programmer, but I changed and became a communications tech for most of my career. Now that I’ve retired I’m looking to recapture the joy of programming but I’m having some difficulty getting going. I created a simple plot with 6 gauges and it works perfect displaying the values out of a data file that I created with python. Now I’d like to have it update by re-reading the data file once every 5 seconds and displaying the current values.
I know I need to use dcc.Interval, then trigger the update, and have callback but my old brain just isn’t getting it.
Here is a simplified segment of my current code.
Imports
app = Dash (name)
df = pd.read_csv("datafile.csv)
vext = df.at[0,‘ext’]
vint = df.at[0,‘int’]
layout **************************************
app.layout = dbc.Container([
dbc.row([
dbc.Col([
daq.Gauge(id=‘my_gauge_ext’,
label={‘label’:‘Ext’, ‘style’:{‘font-size’:‘30px’}},
showCurrentValue=True,
value=vext,
max=250,
min=100
)
daq.Gauge(id=‘my_gauge_int’,
label={‘label’:‘Int’, ‘style’:{‘font-size’:‘30px’}},
showCurrentValue=True,
value=vint,
max=250,
min=100
)
])
])
])
callbacks ************************************
@app.callback(
Output(‘my_gauge_ext’, )
Input('my_gauge_ext, )
@app.callback(
Output(‘my_gauge_int’, )
Input('my_gauge_int, )
if name == “main”:
app.run_server(debug=True)
The interval would be something like this but I’m not clear on where to put it in the layout, how do I trigger it and what variables do I put in the callbacks.
dcc.Interval(
id=‘my_interval’,
disabled=False,
interval=5*1000)
Any help you can offer will be most gratefully appreciated!
Thank you
3 posts - 2 participants