def update_from_entry(self, group_name):
        """Update color value from entry group.

        This method grabs the color values from an specific
        entry group (from a color space) and then uses them
        to update the corresponding scales, then triggers
        to self.update_from_scale method which in turn
        updates the rest of the widgets and stores the rgb
        color values.

        group_name
            String use as key to retrieve the entries from
            which to grab and convert the color values.
            It represents a color space name.
        """
        ### iterate over corresponding scale group updating
        ### each scale with value of respective entry

        for scale, entry in zip(self.scale_map[group_name], self.entry_map[group_name]):
            scale.set(entry.get(), False)

        ### then update remaining scales and entries
        ### by delegating to update_from_scale() method;
        ###
        ### this also has the desired side effect of
        ### updating the color unit surface
        self.update_from_scale(group_name, False)
Update color value from entry group.

        This method grabs the color values from an specific
        entry group (from a color space) and then uses them
        to update the corresponding scales, then triggers
        to self.update_from_scale method which in turn
        updates the rest of the widgets and stores the rgb
        color values.

        group_name
            String use as key to retrieve the entries from
            which to grab and convert the color values.
            It represents a color space name.
        
nodezator/colorsman/editor/widgetop.py