【ValueError: Duplicated level name: "Date", assigned to level 1, is already used for level 0.】临时解决方法

• 个人认为这是由于两级的索引名称重名导致的，传入groupby时重命名各级所以很难即可解决

• 具体操作如下

groupby([baba.index.year.rename('year'),baba.index.month.rename('month')])['rise'].count()

此时我的jupyter 报错提示
ValueError: Duplicated level name: "Date", assigned to level 1, is already used for level 0.

• 解决办法

• 将其重命名后传递给groupby
• rename

* groupby([baba.index.year.rename('year'),baba.index.month.rename('month')])['rise','fall'].count()

20181116
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