def center(self):
    '[summary] determinate the center of the ball\n\n        Returns:\n            [numpy array list]: [the center of the ball]\n        '
    c = np.zeros(self.__len__())
    for i in range(self.__len__()):
        c[i] = np.mean(self.bounds[i])
    return c
[summary] determinate the center of the ball

Returns:
    [numpy array list]: [the center of the ball]
def center(self):
    '[summary] determinate the center of the ball\n\n        Returns:\n            [numpy array list]: [the center of the ball]\n        '
    c = np.zeros(self.__len__())
    for i in range(self.__len__()):
        c[i] = np.mean(self.bounds[i])
    return c