promemoria per integrazione plotly in flask
## esempio
import plotly.express as px
gapminder_df = px.data.gapminder()
#gapminder_df
px.scatter(data_frame=gapminder_df,
x='gdpPercap',
y='lifeExp',
size='pop',
color='continent',
title='Life Span',
labels={'gdpPercap': 'Wealth',
'lifeExp': 'Life Span'},
log_x=True,
range_y=[25,95],
hover_name='country',
animation_frame='year',
height=600,size_max=100)