(self, radius)
Initialize the filter.
        
        @type  radius: number
        @param radius: Search radius.
Initialize the filter.
Initialize the filter .
def __init__(self, radius):
        """
        Initialize the filter.
        
        @type  radius: number
        @param radius: Search radius.
        """
        self.graph = None
        self.spanning_tree = None
        self.radius = radius
        self.done = False
def __init__ ( self , radius ) : self . graph = None self . spanning_tree = None self . radius = radius self . done = False