class Controller(object):
    def __init__(self, task):
        self.task = task
        self.value = 5

    def onChange(self, value):
        self.value = value
        self.task(value)

class View(object):
    def __init__(self, data):
        self.data = data
        self.shown = self.data
        self.controller = Controller(self.filterByColor) #
        # ^ controllernya, di inisialisasi sama function yang perlu dikerjain controller

    def filterByColor(self, value):
        self.shown = [x for x in self.data if x["color"] == value]
        self.render()

    def render(self):
        # anggep aja, ngerender view ulang
        pass

def main():
    data = [
      {'color': 'red', 'student': 'budi'},
      {'color': 'green', 'student': 'joko'},
      {'color': 'blue', 'student': 'ani'},
      {'color': 'green', 'student': 'hamdi'}
    ]
    view = View(data)
    controller = view.controller
    print view.shown
    [{'color': 'red', 'student': 'budi'}, {'color': 'green', 'student': 'joko'}, {'color': 'blue', 'student': 'ani'}, {'color': 'green', 'student': 'hamdi'}]

    controller.onChange(value="green")
    print view.shown
    [{'color': 'green', 'student': 'joko'}, {'color': 'green', 'student': 'hamdi'}]

main()