I have installed the latest ipywidgets
version 7.5.1 and I use Jupyter nb version 6.0.2. Other ipywidgets
work well. But I do not get any output with the Combobox. No error messages.
widgets.Combobox(# value='John', placeholder='Choose Someone', options=['Paul', 'John', 'George', 'Ringo'], description='Combobox:', ensure_option=True, disabled=False)