adding a local html file into a Div in plotly/dash - html

Question

I created a Dash app. On one tab I have a dropdown and a submit button. In a callback I generate an html file, saved locally, based on quantstats library (reports.html)
I am trying to producing this html within an html.Div but no success so far. All I managed to do is to print out an hyperlink to my local file but not the file itself.
Here is the layout part:
layout = html.Div([
dbc.Container([
dbc.Row([
dbc.Col(html.H1("Reports", className="text-center"), className="mb-5 mt-5")
]),
dbc.Row([
dbc.Col(dcc.Dropdown(id='reports_type',
options=[
{'label': 'YTD', 'value': 1},
{'label': 'ITD', 'value': 2},
],
value=1,
style={'display': 'block'},
)),
dbc.Col(html.Button('Run report', id='reports_submit')),
])
]),
html.Div(id='reports_holder')
])
Here is the callback:
#app.callback(
Output('reports_holder', 'children'),
[
Input('reports_submit', 'n_clicks')
],
[
State('reports_type', 'value')
],
prevent_initial_call=True
)
def produce_report(n_clicks, reports_type):
if n_clicks:
df = some dataframe
if reports_type == 1: #YTD
current_df = df[df.index.year == datetime.date.today().year]
my_pfo = pd.Series(current_df['Close'].values, name='Close', index=current_df.index)
qs.reports.html(my_pfo, "SPY", output='quantstats-tearsheet.html', title='YTD Tearsheet')
else: #ITD
my_pfo = pd.Series(df['Close'].values, name='Close', index=df.index)
qs.reports.html(my_pfo, "SPY", output='quantstats-tearsheet.html', title='ITD Tearsheet')
f = codecs.open('quantstats-tearsheet.html', 'r')
return f
Here is my latest try using the codecs library (this creates an error because the html documents cannot be JSON serializable). If I return f.read() instead then this is not html formated.
As said before I tried html.A instead of html.Div in my layout but this produces only an hyperlink (as expected with html.A). Should I use the property target with html.A but then how do I sepcify that the document should be opened in that same html.A? There must be a straightforward solution to this but I can't find it (most solutions involve opening a local html file into a new browser tab...)
Edit: here is an example of the html report generated via quantstats