import panel as pn
pn.extension()

toggle_group = pn.widgets.ToggleGroup(name='ToggleGroup', options=['Biology', 'Chemistry', 'Physics'])

toggle_group

toggle_group.value

toggle_group = pn.widgets.ToggleGroup(name='ToggleGroup', options=['Biology', 'Chemistry', 'Physics'], behavior="radio")

toggle_group

toggle_group.value

type(toggle_group)

pn.Row(toggle_group.controls(jslink=True), toggle_group)