plotly_dropdown_bar.py

# add a dropdown menu in the layout
layout.update(updatemenus=list([
    dict(x=0,
         y=1,
         xanchor='left',
         yanchor='middle',
         buttons=list([
             dict(
                 args=['visible', [True, False, False, False]],
                 label='Property type: Unit buy/M',
                 method='restyle'
                 ),
             dict(
                 args=['visible', [False, True, False, False]],
                 label='Property type: Unit rent',
                 method='restyle'
                 ),
             dict(
                 args=['visible', [False, False, True, False]],
                 label='Property type: House rent',
                 method='restyle'
                 ),
             dict(
                 args=['visible', [False, False, False, True]],
                 label='Property type: House buy/M',
                 method='restyle'
                )
            ]),
        )]))