基础用法中有个tip的代码有问题

[JiaxingZhao]

https://github.com/teadocs/pandas-cn/blame/v0.25.0/docs/docs/getting_started/basics.md#L382

'three': pd.Series(np.random.randn(3), index=['a', 'b', 'c', 'd'])})

Series长度为3，index长度为4，会报错