spacing in scroll view not working

[Degenerate Tech]

class RightColumn(ScrollView):

def __init__(self,**karg):

super().__init__(**karg)

self.size_hint=(1, None)

#self.scrview=ScrollView()

self.grid=GridLayout(cols=1,size_hint_y=None,spacing=100)

self.grid.bind(minimum_height=self.grid.setter('height'))

for i in range(16):

self.grid.add_widget(Button(size_hint_y=None,height='90dp'))

self.add_widget(self.grid)

[Degenerate Tech]

okk..it is working...i did a silly  mistake..