how to implement a double tap in kivy

[mcroni]

i am trying to build an app that implements a double tap feature to open another screen, the UI includes a textinput. but with this implementation the textinput doesnt respond.

def change(self):
    self.manager.current = 'screen2' 

def on_touch(self,touch):
    if touch.is_double_tap(self):
    self.change()