#NEWLINE# def __init__( self , top = 0 , bottom = 0 , left = 0 , right = 0 ) : #NEWLINE# #INDENT# assert isinstance ( top , Integer ) #NEWLINE# assert isinstance ( bottom , Integer ) #NEWLINE# assert isinstance ( left , Integer ) #NEWLINE# assert isinstance ( right , Integer ) #NEWLINE# self . _top = top #NEWLINE# self . _bottom = bottom #NEWLINE# self . _left = left #NEWLINE# self . _right = right