Inconsistent Callback Error Updating Scatter Plot

Dash Python
8

Hi,

I might have found a hack :

try:
    fig = px.scatter(...)
except Exception:
    fig = px.scatter(...)  # Exact same line as previously
return fig

It works in for me in development, and I’ll try later in production.

The idea behind is that it works randomly at the first attempt but always works on the second (e.g. when refreshing the page). Here I don’t wait for a refresh and force the second attempt in the except part.

On my trials to fix it, I also added prevent_initial_callback=True to some of the @app.callback(...) because callbacks producing plotly figures are called whenever a dcc.Store data attribute changes. Thus I make sure that callbacks for plotting figures are not triggered before data is maid available.

Let me know if it’s working for you.

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