成功解决pandas\core\frame.py:2754: SettingWithCopyWarning: A value is trying to be set on a copy of a s

成功解决pandas\core\frame.py:2754: SettingWithCopyWarning:  A value is trying to be set on a copy of a s

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解决问题

pandas\core\frame.py:2754: SettingWithCopyWarning: 
A value is trying to be set on a copy of a slice from a DataFrame

解决思路

发生在pandas\core\frame.py文件内，
设置复制警告:：试图在DataFrame切片的副本上设置一个值。其实，这是Pandas的API改了使用方法。
请参阅文档中的警告：http://pandas.pydata.org/pandas-docs/stable/indexing.html#indexing-view-versus-copy
self._update_inplace (new_data)

解决方法

参考文章：成功解决SettingWithCopyWarning:  A value is trying to be set on a copy of a slice from a DataFrame