Launch an interactive widget to choose a diverging color palette.
This corresponds with the
diverging_palette() function. This kind
of palette is good for data that range between interesting low values
and interesting high values with a meaningful midpoint. (For example,
change scores relative to some baseline value).
Requires IPython 2+ and must be used in the notebook.
If True, the return value is a matplotlib colormap rather than a list of discrete colors.
Object that can be passed to plotting functions.