(self)
return 0
get current variance
get current variance
get current variance
def get_var(self):
        "get current variance"
        if self.counter > 1:
            return self.var[1] / (self.counter - 1)
        return 0
def get_var ( self ) : if self . counter > 1 : return self . var [ 1 ] / ( self . counter - 1 ) return 0