How to use the colorcet.glasbey function in colorcet

def _validate_point_set_colors(self, proposal):
        value = proposal['value']
        n_colors = len(value)
        if self.point_sets:
            n_colors = len(self.point_sets)
        result = np.zeros((n_colors, 3), dtype=np.float32)
        for index, color in enumerate(value):
            result[index, :] = matplotlib.colors.to_rgb(color)
        if len(value) < n_colors:
            for index in range(len(value), n_colors):
                color = colorcet.glasbey[index % len(colorcet.glasbey)]
                result[index, :] = matplotlib.colors.to_rgb(color)
        return result