这里我有一些包含任何特定元素的列表（a、b和c）
a = [2, 4, [9, 10]]
b = [1, 3, 5, 9, [11, 13, 14, 15, [16, 17, 19, 24]]]
c = [2, 4, [5, 11, 13, [14, 17, 29, [31, 19]]]]
npA = np.array(a, dtype = object)
npB = np.array(b, dtype = object)
npC = np.array(c, dtype = object)
我正在尝试获取每个列表中最深的列表a，，bc
print(npA[-1]) # it shows [9,10]
print(npB[-1][-1]) # it shows [16, 17, 19, 24]
print(npC[-1][-1][-1]) # it shows [31, …