gviewer | Light Weight , but Powerful Terminal UI Library

from gviewer import BaseDisplayer, View, Group, PropsGroup, Text, Prop

class MyDisplayer(BaseDisplayer):
    def to_summary(self, message):
        """
        return a str or text markup
        reference: http://urwid.org/manual/displayattributes.  

from gviewer import View, BaseDisplayer
class MyDisplayer(BaseDisplayer):
    def get_views(self):
        return [("view", self.view)]

    def view(self, message):
        return View([], actions=Actions([("a", "Custom export", self.custom_export)]  

from gviewer import GViewer, DisplayerContext

def custom_export(controller, message, widget, *args, **kwargs):
    with open("export", "w") as f:
        f.write(str(message))
    controller.notify("file is export")

context = DisplayerContext(data_