How can we create data columns in Dash Table dynamically using callback with a function providing the dataframe

Question

I am trying to create dash table on Web using Inputs. However the issue is that the data is created from database from the callback and a priori, I do not know the names of

Answer 1

If I've understood you correctly, then you can simply create another callback which outputs the updated value for the columns prop. You could also use a multi-output callback to update both at the same time.

@app.callback(Output('table', 'columns'),
    [Input('submit', 'n_clicks')],
    [State('ID', 'value'),  State('pattern_desc', 'value'), 
     State('file_path', 'value')])
def update_table(n_clicks, ID, pattern_desc, file_path):
    mydata = someFunc(ID, pattern_desc, file_path)
    # here you would use the dataframe columns to create the new column values
    return new_column_values