How to change the annimation speed of html format using plotly.express

📊 Plotly Python
1

I used px to make a animation we can change the speed in the jupyter notebook. But the speed does NOT change when saving as html file. How to change the following code?

import plotly.express as px
 df = px.data.gapminder()
 fig=px.scatter(df, x="gdpPercap", y="lifeExp", animation_frame="year", animation_group="country",
            size="pop", color="continent", hover_name="country",
            log_x=True, size_max=55, range_x=[100,100000], range_y=[25,90])
fig.layout.updatemenus[0].buttons[0].args[1]["frame"]["duration"] = 50000